The full library · Updated regularly
Every simulation we have built.
693 simulations in 152 virtual labs, mapped to NCERT chapters for Class 6–12, JEE and NEET. 17 are open to everyone, 0 more free for 3 days after sign-up, and Pro opens the lot.
Last updated 26 October 2026
- Simulations
- 693
- Virtual labs
- 152
- Chapters covered
- 43
- Subjects
- 4
By subject & topic
Physics
405 simulations · 129 labs
- Mechanics36 labs · 128 sims
- Fluids4 labs · 30 sims
- Waves & Sound11 labs · 23 sims
- Light & Optics17 labs · 33 sims
- Electricity19 labs · 26 sims
- Magnetism14 labs · 23 sims
- Heat & Matter11 labs · 80 sims
- Modern Physics10 labs · 47 sims
- Electronics3 labs · 7 sims
- Measurement & Vectors4 labs · 8 sims
Chemistry
129 simulations · 20 labs
- Atomic Structure4 labs · 36 sims
- States of Matter5 labs · 62 sims
- Chemical Bonding3 labs · 4 sims
- Reactions & Equilibrium1 lab · 6 sims
- Organic Reactions3 labs · 9 sims
- Stereochemistry5 labs · 14 sims
Mathematics
256 simulations · 16 labs
- Geometry1 lab · 18 sims
- Coordinate Geometry8 labs · 224 sims
- Calculus5 labs · 37 sims
- Vectors1 lab · 3 sims
- Statistics & Probability3 labs · 6 sims
Biology
12 simulations · 3 labs
- Cell Biology1 lab · 5 sims
- Human Physiology2 labs · 7 sims
By class
A lab tagged for two classes counts in both.
- Class 63 labs · 26 sims
- Class 712 labs · 268 sims
- Class 816 labs · 281 sims
- Class 939 labs · 380 sims
- Class 1043 labs · 381 sims
- Class 1194 labs · 589 sims
- Class 1279 labs · 489 sims
By exam
- JEE
- 113
- labs
- NEET
- 88
- labs
- Olympiad
- 3
- labs
All 152 labs, by subject
Each with the concepts it covers, the classes it is for, and what it takes to open it.
152 labs · 693 simulations
Physics
Mechanics36 labs · 128 simulations
- Projectile Motion 2 insideMotion in a Plane · Class 11 · JEE · NEETFire a cannon at a target. Change angle, speed, height and mass, add air resistance, and read time of flight, range and maximum height at any point on the path.trajectoryrangeangle of projectionair resistancedragcannon Pro
- Kepler's Laws 3 insideGravitation · Class 11 · JEE · NEETDrag a planet's velocity and watch its orbit become an ellipse with the sun at one focus. Sweep equal areas in equal times, and check T² ∝ a³.ellipseequal areasorbital periodsemi-major axiseccentricityplanets Pro
- Gravity & OrbitsGravitation · Class 9 · Class 11 · JEEBuild a system of up to four bodies and watch them pull on each other. Change masses and velocities, switch gravity off, and see what keeps the Earth and Moon in orbit.my solar systemn-bodysun earth moonsatelliteorbital velocityescape Pro
- Collision Lab 2 insideWork, Energy and Power · System of Particles · Class 11 · JEE · NEETCollide balls in a line or on a table. Change masses, velocities and elasticity, and watch total momentum stay fixed while kinetic energy may not.momentumelastic collisioninelasticcoefficient of restitutionkinetic energycenter of mass Pro
- Energy Skate ParkWork, Energy and Power · Class 9 · Class 11 · NEETDrop a skater onto a ramp, a loop or a track you bend yourself. Watch kinetic, potential and thermal energy trade places while the total stays constant.conservation of energykinetic energypotential energythermal energyfrictionroller coaster Open
- Gravity Force LabGravitation · Class 9 · Class 11 · NEETTwo masses pull on each other. Change the masses and the distance and watch F = Gm₁m₂/r² — and see that both feel exactly the same force.newton's law of gravitationuniversal gravitational constantinverse square lawthird law Pro
- Hooke's Law 3 insideMechanical Properties of Solids · Oscillations · Class 11 · NEETPull and push a spring and read F = kx. Join two springs in series or parallel to see the effective spring constant, and watch the stored energy ½kx² grow.spring constantrestoring forceelastic potential energysprings in seriessprings in parallel Pro
- Masses & SpringsOscillations · Class 11 · JEE · NEETHang masses on springs and let them bounce. Change k, damping and gravity, compare two springs side by side, and time the period T = 2π√(m/k).simple harmonic motionshmspring mass systemtime perioddampingplanet x Pro
- Pendulum LabOscillations · Class 9 · Class 11 · NEETSwing one or two pendulums. Change length, mass, amplitude, gravity and friction, time the period, and find g on Planet X.simple pendulumtime periodsmall angleacceleration due to gravityplanet xenergy Pro
- Balancing Act 2 insideSystem of Particles and Rotational Motion · Class 9 · Class 11Place bricks and people on a seesaw and remove the supports. It balances when the moments on each side are equal — then play the balance game.torquemomentleverseesawprinciple of momentsequilibrium Pro
- Forces & Motion 4 insideLaws of Motion · Class 9 · Class 11Play tug of war, then push a crate, a fridge and a person across the floor. Balance and unbalance the forces, add friction, and see F = ma.net forcenewton's lawstug of warfrictionaccelerationf = ma Pro
- Relative Velocity: Rain and River 2 insideMotion in a Plane · Class 11 · JEE · NEETWalk through the rain and cross a river to see velocities add as vectors, from the ground and from a moving frame. Find the umbrella angle, the quickest crossing and the way to land directly opposite.rain man problemumbrella angleriver crossingboat river problemshortest timeshortest path Open
- Explosion and Centre of MassSystem of Particles and Rotational Motion · Class 11 · JEE · NEETFire a shell that bursts into fragments in mid-air and watch its centre of mass carry on along the same parabola. Compare momentum before and after the explosion.conservation of momentumprojectile explodescentre of mass motioninternal forcesshell bursts Pro
- Toppling or Sliding 2 insideLaws of Motion · System of Particles · Class 11 · JEEPush a block or tilt the floor beneath it and find out whether it slides or tips over first. See the normal force shift towards the edge as the push grows.toppling conditionblock on incline toppleslide or topplenormal force shiftfriction torque Pro
- Minimum Force to Make a Block SlipLaws of Motion · Work, Energy and Power · Class 11 · JEETwo blocks joined by a spring sit on a rough floor, and a constant force pulls one of them along. Find the least force that ever moves the other block.two blocks spring frictionminimum forcespring block friction jeework energy theoremstick slip Pro
- Rolling Race Down an InclineSystem of Particles and Rotational Motion · Class 11 · JEE · NEETRace a solid sphere, a disc, a hollow sphere and a ring down a 3D ramp to see how moment of inertia sets the winner. Lower the friction and watch them start to slip.rolling motionmoment of inertiaring disc sphere racerolling without slippingacceleration of rolling body Open
- Monkey and the HunterMotion in a Plane · Class 11 · JEE · NEETAim a dart straight at a monkey that lets go of the branch the moment you fire, and it still hits. See why both fall the same distance below the aim line.monkey hunter problemprojectile hits falling targetaim directlyrelative motion under gravity Pro
- Newton's Cannon and Satellites 2 insideGravitation · Class 11 · JEE · NEETFire a cannonball from a mountain fast enough to orbit the Earth, or escape it, then launch a satellite at any angle. Watch it sweep equal areas in equal times.orbital velocityescape velocitynewton cannonballsatellite launchkepler second lawequal areas Pro
- Cycloid: Isochrone and Brachistochrone 2 insideWork, Energy and Power · Oscillations · Class 11 · JEERelease beads from different heights on a cycloid and see them reach the bottom together, then race four tracks. Find out which path is the quickest way down.brachistochronetautochroneisochrone curvefastest pathcycloid pendulum Pro
- Solar System 3DGravitation · Class 6 · Class 9 · Class 11Fly around the Sun and its eight planets in 3D, each moving at its real relative speed. Follow any planet and check Kepler's third law, T² ∝ a³.solar system modelplanets orbit speedkepler third laworbital periodplanets 3d Pro
- Motion Graphs & Equations of Motion 2 insideKinematics · Class 9 · Class 11 · JEE · NEETDrive a car through a journey and watch its x–t, v–t and a–t graphs draw themselves from the same motion. Read velocity as the slope of x–t and displacement as the area under v–t, build your own journey, and test v = u + at and s = ut + ½at².position time graphvelocity time graphacceleration time graphx-t graphv-t graphslope of graph Open
- Meeting & OvertakingKinematics · Class 11 · JEESet two cars going with their own start, speed, acceleration and delay, and find when and where they meet. The meetings are where the x–t graphs cross; switch to car A's view to see it as relative motion.two cars meetwhen and where do they meetovertaking problemrelative velocity in one dimensioncatch up problemhead on Pro
- Vertical Motion Under Gravity 2 insideKinematics · Class 9 · Class 11 · JEE · NEETThrow a ball straight up and follow its height, velocity and acceleration all the way back down. Strobe dots show the symmetry of the flight; with two balls, drop one and throw the other and find where they pass.ball thrown upwardfree fallmaximum heighttime of flighttime to reach the topmotion under gravity Pro
- Inclined Plane with FrictionLaws of Motion (NLM) · Class 9 · Class 11 · JEE · NEETPut a block on a slope and see every force on it: weight and its components, the normal force, friction and a push. Tilt it until it slips to find the angle of repose, then compare static and kinetic friction.block on inclineinclined planemg sin thetamg cos thetaangle of reposestatic friction Pro
- Connected Bodies: Pulleys & Blocks 5 insideLaws of Motion (NLM) · Class 11 · JEE · NEETSolve five classic set-ups by watching them move: blocks in contact, blocks on a string, the Atwood machine, a table with a hanging mass, and stacked blocks. Every force on every body is drawn, with the acceleration and tension worked out.atwood machineblocks in contactcontact forcetension in stringtwo blocks connected by stringblock on table hanging mass Pro
- Lift & Apparent WeightLaws of Motion (NLM) · Class 9 · Class 11 · JEE · NEETStand on a bathroom scale in a lift and watch the reading change as it speeds up, cruises and slows down. The scale shows N = m(g + a): more going up, less going down, zero when the cable snaps.apparent weightweight in a liftelevator problemweightlessnessscale reading in liftnormal reaction Pro
- Pseudo Force in Accelerating Frames 3 insideLaws of Motion (NLM) · Class 11 · JEEWatch a pendulum in a truck, a block on a cart's wall and a ball on a bus floor, from the road and from inside. Inside an accelerating vehicle, adding the pseudo force −ma₀ makes Newton's laws work again.pseudo forcefictitious forcenon inertial frameinertial framependulum in accelerating carblock on accelerating cart wall Pro
- Circular Motion & Banked Roads 4 insideCircular Motion · Class 11 · JEE · NEETSee why a ball moving at constant speed in a circle is still accelerating, and what supplies mv²/r on a flat curve, a banked road and a vertical loop. Find the safe speeds and the √(5gr) needed to loop the loop.uniform circular motioncentripetal accelerationcentripetal forcev squared by rcar on a curvebanking of roads Pro
- Work, Energy & Power Lab 24 insideWork, Energy & Power · Class 6–12 · JEETwenty-four experiments from "what counts as work" to JEE Advanced: work and its sign, kinetic and potential energy, force–position graphs, power and efficiency, springs, conservative forces, potential-energy curves and equilibrium, friction, pulleys and system boundaries, the vertical loop, a 3D rocket, two blocks and a spring, release protocols, collisions, machines, spring networks, moving surfaces, a 3D saddle, a trap detector and a challenge arena. All 121 questions of Edukul's work–energy question bank are built in, each with a "Show me".work donework energy theoremkinetic energypotential energyreference levelforce position graph Pro
- Pulley & Constraint Lab 15 insideLaws of Motion (NLM) · Class 11 · 12 · JEEFifteen pulley experiments on one engine that measures every string from its geometry — tangent runs and wrapped arcs — and differentiates it, so no constraint is memorised. Atwood machines, movable and compound pulleys, pulleys riding on wedges and platforms, the truck, stepped-block and wedge-chain figures, a tiny-displacement builder, a build-your-own editor, a JEE challenge lab, slipping strings and when tensions are equal. Every arrangement also runs in 3D.pulleyconstraint motionconstrained motionstring constraintatwood machinemovable pulley Pro
- Centre of Mass Lab 20 insideSystem of Particles and Rotational Motion · Class 7–12 · JEE · NEETTwenty experiments on one centre-of-mass engine, from two beads on a rail to JEE Advanced: drag particles in 1D, 2D and 3D; balance a metre rule; hang a plate from its holes and watch the plumb lines cross; semicircular wires, plates and hemispheres; a triangle with draggable corners; rods of varying density; plates with holes as negative mass; then the motion of the centre of mass — internal springs, collisions in the centre-of-mass frame, a tumbling throw, a bursting shell, walking on a plank, the ballistic pendulum, binary orbits, a chain sliding off a table, a block on a free wedge, a three-fragment explosion and jumping off a trolley.centre of masscenter of masssystem of particlescentre of mass of two particlescentre of mass formulacentre of mass in 3d Pro
- The Rocket in Empty Space 3 insideSystem of Particles · Class 11 · JEEA rocket floats beside a satellite in deep space and burns its fuel as separate puffs of gas, in 3D. Momentum bars for the rocket and the gas grow equal and opposite; later puffs add more speed than early ones; smaller puffs approach the smooth u ln(m₀/m₁); and on a launch pad, thrust must beat the weight.rocket propulsionrocket in empty spaceconservation of momentum rocketvariable mass systemrocket equationtsiolkovsky Pro
- Same Force, Different Point: The Sign of a Moment 3 insideSystem of Particles and Rotational Motion · Class 9–11 · JEEOne force acts on a plate in 3D, and you pick the point to take moments about. Tap A, B or C, or drag the pivot along the edge and watch the moment trace a straight line through zero where it meets the line of action. Pin the plate and let go to see which way it really turns.moment of a forcetorque about a pointsign of torqueclockwise anticlockwise momentline of actionmoment arm Pro
- Rotational Motion Lab 8 insideSystem of Particles and Rotational Motion · Class 8–12 · JEE · NEETEight 3D experiments from torque to JEE Advanced: slide your hand along a wrench and aim the push until the stuck nut turns; race a ring, disc, shell and sphere with their mass shown as beads; drag the masses on a spinning platform in and watch ω rise while L stays fixed; see the velocity of every point of a rolling wheel and the cycloid of its rim; a heavy pulley whose two tensions differ; a hinged rod that outruns a coin on its tip; the spool that rolls away while you pull it towards you; and a ball striking a hinged rod, with the centre of percussion.rotational motionsystem of particles and rotational motiontorquemoment of forcelever armtorque wrench Pro
- Time of Flight, Height & Range (3D)Motion in a Plane · Class 11 · JEE · NEETLaunch from the ground or a roof in 3D, on Earth, the Moon or Mars. Read time up, time down, maximum height and range together, compare with the complementary angle, and see the level-ground rules fail from a height.time of flightmaximum heightrange of projectileprojectile from heightcomplementary angles same range45 degrees maximum range Pro
- Archimedes' Lever: Moving the EarthSystem of Particles and Rotational Motion · Class 9–11Balance the Earth against a person on a lever drawn on a logarithmic scale: the arm needed reaches past the Andromeda galaxy. Fly along the beam past the Moon, the Sun and the Milky Way, and see what lifting the Earth by a millimetre would cost.give me a place to standarchimedes leverlaw of the leverprinciple of momentsmechanical advantage Pro
Fluids4 labs · 30 simulations
- BuoyancyMechanical Properties of Fluids · Class 9 · Class 11 · NEETDrop blocks of wood, ice, brick and aluminium into water, oil or honey. Read the weight, buoyant force and apparent weight, and see Archimedes' principle hold every time.archimedes principlefloatingsinkingupthrustapparent weightboat Open
- Density 3 insideMatter · Fluids · Class 8 · Class 9Change a block's mass and volume and watch its density — and whether it floats. Then identify mystery blocks by measuring mass and the water they displace.massvolumemystery blockdisplacementfloat sink Pro
- Under PressureMechanical Properties of Fluids · Class 9 · Class 11Lower a pressure gauge into a pool and watch the reading climb with depth. Change the fluid, gravity and the pool's shape — pressure depends only on depth.fluid pressurehydrostatic pressureatmospheric pressuredepthp = rho g hpascal Pro
- Fluid Mechanics Lab 25 insideMechanical Properties of Fluids · Class 9–12 · JEE · NEETTwenty-five experiments from density and pressure to JEE Advanced: pressure with depth, the hydrostatic paradox, Pascal's law, barometers and manometers, the force on a dam gate, Archimedes and floating, layered liquids, surface tension and capillarity, streamlines, continuity, Bernoulli, the Venturi meter, Torricelli's jets, ideal-flow lift on an aerofoil, viscosity, Stokes' law, Poiseuille, the Reynolds number, drag beyond Stokes, real pipes with pumps, combined manometer systems and a challenge builder. Every model states its assumptions and warns when it stops applying.fluid mechanicsmechanical properties of fluidsdensityrelative densitypressurehydrostatic pressure Pro
Waves & Sound11 labs · 23 simulations
- Normal Modes 2 insideOscillations · Waves · Class 11 · OlympiadA row of masses joined by springs. Pull one and the motion looks messy — but it is a sum of normal modes, each a standing wave with its own frequency.coupled oscillatorsmasses and springs chainstanding wavesmode shapes Pro
- Fourier: Making Waves 3 insideWaves · Class 11 · OlympiadAdd sine waves of different harmonics and watch them build a square, sawtooth or triangle wave. Hear the sound change, then play the wave-matching game.harmonicsfourier seriessquare wavesawtoothsuperpositionwave packet Pro
- Wave InterferenceWave Optics · Waves · Class 11 · Class 12 · JEE · NEETMake water ripples, sound or light from one or two sources. Add a barrier with one or two slits and watch interference and diffraction patterns form on the screen.waves introripple tankdouble slitsingle slit diffractionyoung's experimentconstructive destructive Open
- Sound Waves 4 insideSound · Waves · Class 9 · Class 11A speaker pushes air molecules back and forth. See compressions and rarefactions travel, change pitch and loudness, listen to it, and pump the air out to watch sound die.longitudinal wavecompressionrarefactionpitchloudnessfrequency Pro
- Wave on a StringWaves · Class 11 · JEE · NEETWiggle the end of a string, pulse it, or drive it with an oscillator. Change tension and damping, fix or free the far end, and build standing waves.transverse wavestanding wavesreflectionfixed endloose endtension Pro
- Tuning Fork & Sound Waves 2 insideWaves · Class 9 · 11 · JEE · NEETStrike a tuning fork and watch the air molecules around it bunch into compressions and spread into rarefactions. Change the frequency and temperature, hear the note, and put two forks together to hear beats.tuning forksound wavelongitudinal wavecompressionrarefactionair molecules Pro
- The Cochlea & Audible RangeNeural Control and Coordination (the ear) · Sound · Class 9 · 11 · NEETSweep a tone from 20 Hz to 20 kHz and see where it makes the cochlea's basilar membrane vibrate most: high notes near the oval window, low notes at the apex. Listen, test your own upper limit, and see how it falls with age.cochleaearhearingaudible frequencyhair cellsbasilar membrane Pro
- Standing Waves 3 insideWaves · Class 11 · JEE · NEETTwo waves travelling opposite ways add up to a wave that stays put. See nodes and antinodes on strings and in open and closed pipes, drive a string until it resonates at its harmonics, and play a guitar string by moving your finger along the frets.standing wavesstationary wavesnodes and antinodesharmonicsovertonesopen pipe Pro
- Doppler EffectWaves · Class 11 · JEE · NEETDrive a siren past a microphone and watch the wavefronts bunch up ahead and spread out behind it. Hear the pitch drop and push the source past the speed of sound.apparent frequencymoving sourcemoving observersonic boommach conesiren pitch Pro
- Reflection & Transmission of a Pulse 3 insideWaves · Class 11 · JEE · NEETA pulse runs along a 3D string of beads and hits a fixed end, a free ring, or a joint with a heavier or lighter string. Watch it come back inverted or upright, see part of it carry on, and compare the reflected and transmitted heights with r = (v₂ − v₁)/(v₁ + v₂) and τ = 2v₂/(v₁ + v₂).reflection of a pulsefixed end reflectionfree end reflectionphase change on reflectionpulse invertedtransmission at a boundary Pro
- Energy of a Travelling Wave 2 insideWaves · Class 11 · JEEA sine wave runs along a 3D string, each bead glowing by its energy. The surprise: kinetic and stretch energy both peak where the string crosses its rest line, not at the crests. Change amplitude, frequency, speed and mass per metre and watch the power P = ½μω²A²v.energy of a waveenergy carried by a wave on a stringpower of a waveintensity of wavekinetic energy densitypotential energy density Pro
Light & Optics17 labs · 33 simulations
- Lenses & MirrorsRay Optics · Class 10 · Class 12 · NEETMove an object in front of a convex or concave lens or mirror and watch the principal rays find the image. Read u, v, f and the magnification as you move.geometric opticsray diagramconvex lensconcave mirrorfocal lengthimage formation Pro
- Blackbody SpectrumDual Nature · Thermal Properties · Class 11 · Class 12 · JEEHeat an object from 300 K to 10 000 K and watch its glow change colour. The spectrum's peak slides by Wien's law and the total power climbs as T⁴.planck's lawwien's displacement lawstefan boltzmannthermal radiationtemperature colour Pro
- Bending Light 2 insideRay Optics · Class 10 · Class 12 · JEE · NEETShine a laser from air into water or glass and watch it bend. Measure angles with the protractor, find total internal reflection, and split white light with a prism.refractionsnell's lawrefractive indextotal internal reflectioncritical angleprism Pro
- Molecules & LightDual Nature · Environment · Class 11 · Class 12Shine microwaves, infrared, visible or ultraviolet light on CO₂, H₂O, O₂, O₃ and more. See which photons are absorbed and what the molecule does — rotate, vibrate, glow or break apart.greenhouse effectinfrared absorptionuvmicrowavephoton energymolecular vibration Pro
- Colour Vision 2 insideHuman Eye and the Colourful World · Class 10Mix red, green and blue light and see the colour a person perceives. Then pass white or single-colour light through a filter.rgbadditive colour mixingcolour filtermonochromatic lightwavelengthphotons Pro
- Polarisation of Light 2 insideWave Optics · Class 12 · JEE · NEETSend unpolarised light through a polariser and an analyser and watch the electric field in 3D. Turn the analyser to see Malus's law, I = I₀cos²θ, add a third plate between crossed polarisers, and find Brewster's angle on reflection.polarizationpolariserpolarizeranalyserMalus's lawBrewster's angle Pro
- Electromagnetic Waves 2 insideElectromagnetic Waves · Class 12 · JEE · NEETAn oscillating charge in an antenna sends out electromagnetic waves. Watch the electric and magnetic fields travel outwards together, at right angles to each other and to the direction of travel, then sweep the frequency across the whole spectrum from radio to gamma rays.electromagnetic waveEM waveoscillating chargeantennaelectric and magnetic fieldelectromagnetic spectrum Pro
- Prism: Minimum Deviation and Dispersion 2 insideRay Optics and Optical Instruments · Class 12 · JEE · NEETTrace a ray through a glass prism, record the deviation at each angle of incidence and plot the i–δ graph. Find the minimum, then split white light into a spectrum.angle of minimum deviationi-delta graphrefractive index of prismdispersiondispersive powerprism experiment Open
- Mirage and Layered Media 2 insideRay Optics and Optical Instruments · Class 10 · Class 12 · JEESend light through layers whose refractive index falls step by step and watch it bend until it is turned back. See how a hot road makes a mirage of water.miragemultiple slab refractiontotal internal reflection in airloomingn sin theta constanthot road mirage Pro
- Young's Double-Slit Lab (3D) 6 insideWave Optics · Class 12 · JEE · NEETYoung's experiment on a 3D optical bench: a laser, two slits and a screen, with wavefronts spreading from both slits and the fringe pattern computed on the screen. Drag the screen to change D and a slit to change d; move a probe along the screen to see path difference, phase and intensity; cover one slit with a glass sheet, raise the source slit, switch to white light, fill the bench with water, and give the slits a real width so the envelope wipes out whole orders — then send the light one photon at a time.young's double slit experimentydsedouble slitinterference of lightfringe widthβ = λd/d Pro
- Fermat's Principle of Least Time 3 insideRay Optics · Class 10–12 · JEELight takes the path of least time. Race beads from A to B along many paths at once — off a mirror, across a boundary into glass, and through a lens — and drag the crossing point to find the quickest. The law of reflection, Snell's law and why a lens focuses all fall out of one rule.fermat's principleprinciple of least timeleast time pathlaw of reflection proofsnell's law derivationlifeguard problem Pro
- Huygens' Principle: Reflection & Refraction 2 insideWave Optics · Class 12 · JEE · NEETA plane wavefront sweeps onto a mirror in 3D. Every point it touches sends out a growing wavelet, and the reflected wavefront is the line touching them all. Slide the angle and the time, see the congruent triangles that prove i = r, then send the wave into glass and prove Snell's law the same way.huygens principlehuygens constructionsecondary waveletswavefrontproof of law of reflectionproof of snell's law Pro
- Images in Two Angled MirrorsRay Optics · Class 7–12 · JEETwo hinged mirrors and an object: every image formed by reflection chains, all on one circle round the hinge, with the true ray path traced to any image you tap. See 360/θ − 1 at even ratios and the position rule when it is odd.two plane mirrors at an anglenumber of images 360/theta - 1kaleidoscopemultiple reflectionplane mirror images Pro
- Focal Length Lab: Concave Mirror & Convex Lens 3 insideLight: Reflection and Refraction · Ray Optics · Class 10 · Class 12Do the focal-length practical at a 3D lab table, one step at a time: focus a distant tree on a cardboard screen with a concave mirror and a convex lens (Class 10), then run the u–v method on an optical bench — index correction, parallax removed tip to tip, six readings, the u–v and 1/u–1/v graphs (Class 12). Close-ups magnify the scale, the screen and the needle tips; readings scatter like real ones.focal length of concave mirrorfocal length of convex lensdistant object methodu-v methodoptical benchparallax removal Pro
- Glass Slab Practical: Tracing a Ray Through a Rectangular Glass SlabLight: Reflection and Refraction · Class 10 Practical · Class 10 · CBSE practicalThe Class 10 practical, done on a drawing board: draw the slab's outline and the normal, set the angle of incidence, fix pins P and Q, then look through the glass and drag pins R and S until they line up with the images. Join your own pins, lay the protractor on your lines and read ∠r and ∠e to 1°. Three trials fill the observation table; the result shows ∠e = ∠i and the lateral displacement, with precautions and viva questions.tracing the path of a ray of light through a glass slabrefraction through glass slabglass slab experimentangle of incidence angle of refraction angle of emergencelateral displacementpin method Pro
- Glass Prism Practical: Tracing Rays Through a PrismLight: Reflection and Refraction · Class 10 Practical · Class 10 · CBSE practicalTrace the path of a ray through a 60° glass prism with four pins, exactly as in the lab: set the angle of incidence, fix P and Q, sight through the second face and line R and S up with the images, then measure the angle of emergence and the angle of deviation on your own lines. Three trials show the deviation changing with ∠i, its minimum when ∠i = ∠e, and a rough refractive index.tracing the path of the rays of light through a glass prismrefraction through prismangle of deviationangle of emergenceangle of prismminimum deviation Pro
- Convex Lens Practical: Image Distance for Different Object DistancesLight: Reflection and Refraction · Class 10 Practical · Class 10 · CBSE practicalA candle, a convex lens and a screen on a metre bench. Put the candle beyond 2F₁, at 2F₁, between F₁ and 2F₁, at F₁ and inside F₁; for each, slide the screen until the flame is sharp, read both pointers to the 1 mm least count, and see the matching ray diagram. At F there is no sharp image anywhere, and inside F you look through the lens for the virtual image. The observation table, result, precautions and viva follow.to find image distance for varying object distances of a convex lensconvex lens ray diagramsimage formation by convex lensobject at 2fobject between f and 2fobject beyond 2f Pro
Electricity19 labs · 26 simulations
- Circuit LabCurrent Electricity · Alternating Current · Class 10 · Class 12 · JEEBuild circuits from batteries, resistors, bulbs, switches, capacitors, inductors and AC sources. Watch the current flow, probe with meters, and graph RC charging and RLC resonance.circuit construction kitseriesparallelkirchhoffammetervoltmeter Pro
- Coulomb's LawElectric Charges and Fields · Class 12 · JEE · NEETTwo charges push or pull. Change their sizes, signs and separation and watch F = kq₁q₂/r² — the same inverse-square form as gravity, but able to repel.electrostatic forcepoint chargesinverse square lawattraction repulsion Pro
- Capacitor Lab 2 insideElectrostatic Potential and Capacitance · Class 12 · JEE · NEETChange the plate area, the gap and the battery voltage and watch charge build up on a capacitor. Then disconnect it and discharge it through a bulb.parallel plate capacitorcapacitancechargestored energyelectric fieldrc discharge Pro
- Charges & FieldsElectric Charges and Fields · Electrostatic Potential · Class 12 · JEE · NEETPlace positive and negative charges and see the electric field and potential they make. Drag a sensor for E, plot equipotentials, and build a dipole.electric field linesequipotentialelectric potentialdipolevoltagesuperposition Pro
- Static Electricity 2 insideElectric Charges and Fields · Class 8 · Class 12Rub a balloon on a sweater and watch electrons move, then stick it to the wall. Shuffle John's foot on a carpet until he gets a shock from the doorknob.balloons and static electricityjohn travoltagecharging by frictioninductionsparkdischarge Pro
- Ohm's Law & Resistance 2 insideCurrent Electricity · Class 10 · Class 12 · NEETChange voltage and resistance and watch the current — and the letters of V = IR — grow and shrink. Then stretch and thicken a wire to see R = ρL/A.v = irresistance in a wireresistivitycurrentvoltager = rho l / a Pro
- Meter BridgeCurrent Electricity · Class 12 practical · JEEThe Class 12 practical: slide the jockey along a 100 cm wire until the galvanometer reads zero, then find the unknown resistance from X = R(100 − l)/l. Record readings, swap R and X, and work out the wire's resistivity.metre bridgemeter bridge experimentWheatstone bridgebalance pointnull pointunknown resistance Open
- Electric Field of a Charged Ring 2 insideElectric Charges and Fields · Class 12 · JEESee the electric field lines of a uniformly charged ring in 3D and move a test charge along its axis. Then watch a negative charge oscillate through the ring.field on axis of ringring of chargemaximum field r/root2charge oscillating on axis of ringelectric field lines 3d Pro
- Charge Between Two ChargesElectric Charges and Fields · Oscillations · Class 12 · JEEPlace a free charge between two fixed charges, find the point where the forces balance and nudge it away. It oscillates one way and escapes the other.neutral pointstable equilibrium chargeaxial oscillationearnshaw theoremsmall oscillations coulomb Pro
- Charges and Fields on a Conductor 2 insideElectrostatic Potential and Capacitance · Class 12 · JEE · NEETAdd charges inside a conductor and watch them run to the surface, then see the field lines crowd at a sharp point. The field inside stays zero.charge resides on surfacefield inside conductor zerosurface charge density sharp pointcorona dischargeelectrostatic shielding Pro
- Van de Graaff GeneratorElectrostatic Potential and Capacitance · Class 12 · JEE · NEETRun a Van de Graaff generator, watch charge ride the belt up to the dome and the voltage climb until a spark jumps across. Touch the dome and the hair rises.van de graaffhigh voltage generatordielectric strength of airhair standing upspark discharge Pro
- Resistor Colour CodeCurrent Electricity · Class 10 · Class 12 · JEERead a carbon resistor's colour bands by clicking them, write any value as bands, or practise reading random resistors. Four-band and five-band codes are both covered.colour code of resistorscarbon resistorbb roy of great britainresistor bandstolerance band Pro
- LC Oscillations 3 insideAlternating Current · Class 12 · JEE · NEETA charged capacitor joined to a coil, in 3D: charge drains off the plates, current runs round the wire and the coil's magnetic field swells, then it all swings back. Energy bars show ½CV² and ½Li² trading places; a mass on a spring moves in step beside it; and resistance damps it out.lc circuitlc oscillationoscillating circuittank circuitenergy in capacitor and inductorelectric and magnetic energy Pro
- Gauss's LawElectric Charges and Fields · Class 12 · JEEPoint charges and a sphere, cylinder or irregular blob in 3D. The flux is integrated numerically over the surface — and always equals q_enclosed/ε₀, whatever the shape. Charges outside add nothing: their field enters and leaves.gauss's lawelectric fluxgaussian surfaceq enclosed by epsilon0flux through closed surface Pro
- Electron Flow vs Conventional CurrentCurrent Electricity · Class 8–12An egg carton with one empty cup: each egg hops one cup, while the gap sweeps across the whole carton the other way. Electrons are the eggs; conventional current is the gap's bookkeeping — the same current described the other way round.conventional currentelectron flowdirection of currentegg carton analogyhole movementdrift Pro
- Ohm's Law Bench (3D)Current Electricity · Class 10–12 · practicalThe school Ohm's-law experiment on a 3D bench, worked directly on the circuit: tap the switch, the rheostat's − and +, and the resistor's value. Record readings or run six settings, and read R from the slope of the I–V graph.ohm's law experimentverification of ohm's lawrheostatammeter voltmeter connectionv-i graphresistance from slope Pro
- Kirchhoff's Loop Rule: Signs Around the LoopCurrent Electricity · Class 12 · JEEFour sealed components on a square and its diagonal, two meters taped over. A test charge walks three loops while a fence rises and falls with the potential; each closed loop gives one equation and reveals one hidden meter. Change the known voltages directly on the 3D circuit.kirchhoff's voltage lawkirchhoff's loop rulesign conventionpotential around a loopsum of voltages zero Pro
- Equivalent Resistance Practical: Resistors in Series and ParallelElectricity · Class 10 Practical · Class 10 · CBSE practicalWire up two resistors marked 4 Ω and 6 Ω — first each alone, then in series, then in parallel — with a battery, plug key, rheostat, ammeter and voltmeter. Read the analog meters to their least counts, take three readings for each connection, and compare the measured series and parallel resistances with R₁ + R₂ and R₁R₂/(R₁ + R₂). The resistors are slightly off their labels, like real ones.to determine equivalent resistance of resistors when connected in series and in parallelresistors in seriesresistors in parallelequivalent resistanceammeter voltmeterleast count of ammeter Pro
- Ohm's Law Practical: V–I Graph of a ResistorElectricity · Class 10 Practical · Class 10 · CBSE practicalStudy how the potential difference across a resistor depends on the current through it. Change the current with the rheostat and the number of cells, read the analog voltmeter and ammeter to their least counts, take five readings, and plot V against I: a straight line through the origin whose slope is the resistance. With the observation table, result, precautions and viva.dependence of potential difference across a resistor on current with graphohm's law experimentv-i graphv i graphpotential difference and currentresistance from graph Pro
Magnetism14 labs · 23 simulations
- AC GeneratorElectromagnetic Induction · Class 12 · JEE · NEETWater turns a bar magnet beside a coil. Change the flow, the number of turns, the coil area and the field, and see ε = NBAω sin ωt light the bulb.generatordynamoinduced emfalternating current Pro
- Magnets & Electromagnets 2 insideMagnetism and Matter · Moving Charges · Class 10 · Class 12Drag a compass around a bar magnet and map its field. Then build an electromagnet from a battery and a coil and see how loops, current and AC change it.bar magnetcompassmagnetic field linessolenoidelectromagnetearth's magnetic field Pro
- Faraday's Law 2 insideElectromagnetic Induction · Class 10 · Class 12 · JEE · NEETPush a bar magnet through a coil and light a bulb. Faster motion, more loops and a stronger magnet give a bigger EMF; reverse the motion and the current reverses.electromagnetic inductioninduced emflenz's lawpickup coiltransformerflux Pro
- Magnetic Field of a Bar MagnetMagnetism and Matter · Class 10 · 12 · JEE · NEETFill the space around a bar magnet with compasses, arrows or iron filings and see its field. Add a second magnet: opposite poles attract and their field lines join; like poles repel and leave a neutral point between them.bar magnetmagnetic field linescompassiron filingsneutral pointattraction Pro
- Induced Magnetism: a Chain of NailsMagnetism and Matter · Class 6–10 · 12Pick up iron nails with a magnet and hang a chain from it: each nail becomes a magnet and holds the next. Pull the top nail off and the soft-iron chain falls apart; steel pins stay stuck together.magnetic inductioninduced magnetismtemporary magnetsoft ironsteelretentivity Pro
- Electromagnetic Induction: Flux & EMF GraphsElectromagnetic Induction · Class 10 · Class 12 · JEE · NEETMove a magnet in and out of a coil and see the magnetic flux and the induced current plotted against time. The current follows how fast the flux changes, reverses as the magnet leaves, and always flows to oppose the change — Lenz's law.Faraday's lawLenz's lawinduced currentinduced emf graphmagnetic fluxmagnet through a coil Pro
- Earth's Magnetic FieldMagnetism and Matter · Class 10 · Class 12 · JEE · NEETTurn a 3D Earth with its magnetic field lines and see why a compass points north. Move a dip needle from the equator to the poles, read the angle of dip, declination and the horizontal and vertical components, and compare places such as Delhi and Chennai.earth's magnetic fieldgeomagnetismangle of dipinclinationdeclinationmagnetic meridian Pro
- Charge in a Magnetic Field 4 insideMoving Charges and Magnetism · Class 12 · JEE · NEETSend a charge into a magnetic field and see it circle, hop through crossed fields, pass a velocity selector and spiral. The helical path is shown in 3D.lorentz forceradius of circular pathcyclotron frequencyvelocity selectorhelical pathcrossed fields Open
- Moving-Coil Galvanometer 3 insideMoving Charges and Magnetism · Class 12 · JEE · NEETTurn a 3D moving-coil galvanometer with its coil, magnets, core and spring, then convert it into an ammeter and a voltmeter. Work out each shunt and series resistance.moving coil galvanometerradial magnetic fieldcurrent sensitivitygalvanometer to ammetergalvanometer to voltmetershunt resistance Pro
- 3D Dynamo: AC and DCElectromagnetic Induction · Class 10–12 · JEE · NEETA coil turns between magnet poles in 3D. Switch between slip rings (alternating output) and a split-ring commutator (pulsating DC with mean 2ε₀/π) and watch the coil's EMF and the terminal output side by side.dc dynamoac generatorsplit ring commutatorslip ringsbrushespulsating dc Pro
- Magnet Dropped Through a CoilElectromagnetic Induction · Class 12 · JEE · NEETA bar magnet falls through a ring or a coil under gravity. The EMF trace shows two opposite pulses, the exit pulse taller and narrower because the magnet has sped up. Flip the magnet to flip both; close the circuit to see Lenz braking.magnet falling through coilmagnet through ringinduced emf pulsesfaraday's lawlenz's lawmagnetic braking Pro
- Torque on a Current-Carrying CoilMoving Charges and Magnetism · Class 12 · JEE · NEETA rectangular coil in a uniform field in 3D, with the force on every side drawn. The long sides form a couple of arm w cos θ, so τ = NBIA cos θ; the short sides' forces cancel along one line. Let it turn and it swings to face the field.torque on a coilnbia cos thetacurrent loop in magnetic fieldmagnetic momentcouplemotor principle Pro
- Fleming's Hand Rules & the Grip Rule 3 insideMoving Charges and Magnetism · Class 10–12 · JEE · NEETA 3D hand placed along the real vectors: field, current and force for the motor (left-hand) rule; field, motion and induced current for the generator (right-hand) rule; and the grip rule for the circular field round a wire. Reverse any vector and watch the hand follow.fleming's left hand rulefleming's right hand ruleright hand thumb ruleright hand grip ruleforce on current carrying conductordirection of induced current Pro
- Magnetic Field of a Straight WireMoving Charges and Magnetism · Class 10–12 · JEE · NEETCircular field lines round a current-carrying wire in 3D, with compass needles and a probe reading B = μ₀I/2πr. Switch to a strength map to see the field halve each time the distance doubles.magnetic field due to straight wiremu0 i / 2 pi rconcentric field linesright hand grip rulecompass around a wireoersted Pro
Heat & Matter11 labs · 80 simulations
- Gas Properties 2 insideKinetic Theory · Thermodynamics · Class 11 · JEE · NEETPump molecules into a box and push the wall, heat it, or cool it. Watch pressure, volume and temperature follow PV = NkT — and the speed histogram spread as the gas warms.ideal gas lawpv=nrtboyle's lawcharles lawkinetic theorypressure Pro
- Energy Forms & Changes 2 insideWork and Energy · Thermal Properties · Class 7 · Class 9Heat and cool blocks of iron and brick and beakers of water and oil, and watch energy flow from hot to cold. Then build a system — sun, tap or kettle → generator or panel → bulb or heater.energy transferheat flowthermal equilibriumenergy conversionsolar panelgenerator Pro
- States of Matter 2 insideMatter · Thermal Properties · Kinetic Theory · Class 9 · Class 11Heat and cool atoms of neon, argon, oxygen or water and watch them melt, boil and condense. Squeeze the container, and see the forces between two atoms on the interaction tab.solid liquid gasphase changemeltingboilinglennard-jonesatomic interactions Pro
- FrictionFriction · Laws of Motion · Class 8 · Class 11Rub one book over another and zoom into the surfaces. The atoms jiggle faster as they heat up — rub hard enough and some break away.friction heatmolecular modelthermal energysurface atomswear Pro
- Thermal Energy & Molecular Motion 4 insideThermal Properties of Matter / Kinetic Theory · Class 7–11 · JEE · NEETFour 3D experiments on what heat is at the level of particles: a box of gas whose molecules speed up as you heat it (with the Maxwell distribution and the three speeds); a cup and a bucket at different temperatures holding very different amounts of thermal energy; a hot block and a cold block touching, their particles' jiggling evening out until both reach one temperature; and why a metal bench feels colder than a wooden one at the same temperature.thermal energymolecular motiontemperature and kinetic energykinetic theoryparticles move faster when heatedaverage kinetic energy 3/2 kt Pro
- Heating Curve of Water 4 insideThermal Properties of Matter · Class 9–11 · JEE · NEETHeat a block of ice on a burner in 3D and watch it warm, melt, warm again, boil and turn to steam while the temperature–heat graph draws itself. See why the temperature stops rising during melting and boiling, read the specific heats of ice, water and steam from the slopes, and drop ice into warm water to find whether it all melts.heating curve of waterheating curveice to steamtemperature vs heat graphlatent heat of fusionlatent heat of vaporisation Pro
- Heat Flow Through Rods: Series & Parallel 4 insideThermal Properties of Matter · Class 11 · JEE · NEETRods between a boiling-water bath and melting ice, in 3D, glowing by temperature with heat current flowing along them as moving dots. Change the material, length and thickness of one rod; join two end to end and find the junction temperature; put two side by side and add their currents; and meet three rods at one junction — the thermal-resistance method JEE uses, with ice melting at the cold end.heat conductionthermal conductivityfourier's lawheat currentrate of heat flowkaδt/l Pro
- Making a Liquid-in-Glass Thermometer 3 insideThermal Properties of Matter · Class 7–11 · JEE · NEETBuild a red-alcohol thermometer step by step in 3D: a glass bulb and fine bore, filling it, sealing it, marking the ice point in melting ice and the steam point over boiling water, dividing the scale — then use it. See what makes one thermometer more sensitive than another, and convert between Celsius, Fahrenheit, Kelvin and a faulty scale.liquid in glass thermometerhow a thermometer worksmaking a thermometeralcohol thermometermercury thermometerfixed points Pro
- Thermal Expansion: Five Experiments 5 insideThermal Properties of Matter · Class 7–11 · JEE · NEETFive classic demonstrations of thermal expansion in 3D: a plate whose hole grows when heated, coloured liquid in a glass tube that dips before it rises, the ball-and-ring, railway rails that need a gap (or buckle), and a cube floating deeper as the liquid warms. Every one is driven by a burner and checked against ΔL = LαΔT.thermal expansionlinear expansionarea expansionvolume expansioncoefficient of linear expansionhole in a heated plate Pro
- Thermal Properties of Matter Lab 50 insideThermal Properties of Matter · Class 7–12 · JEE · NEETThe whole NCERT chapter as one bench: fifty experiments, each acted out in 3D by a demonstrator in a lab coat — a finger dipped in hot water and snatched back, a hot block lifted off a Bunsen burner with tongs and lowered into a calorimeter, a thermometer carried from bath to bath. Thermometry, gas laws, expansion, water's 4 °C anomaly, specific heat, calorimetry, phase changes and phase diagrams, conduction, convection, radiation, blackbody laws, Newton's cooling, and a design challenge that uses all of it.thermal properties of matterthermal properties of matter simulationclass 11 physics chapter 10heat and temperaturethermal equilibriumthermometer Pro
- Heat Transfer 3 insideThermal Properties of Matter · Class 7–11 · JEE · NEETThree benches: a bar between two baths solved with the heat equation (copper settles in minutes, oak in days; remove the lagging and the profile sags), a fluid layer heated from below that stays still until the Rayleigh number passes 1708, and plates facing a lamp that warm according to distance, absorptivity and emissivity.heat transferconductionconvectionradiationthermal conductivityfourier's law Pro
Modern Physics10 labs · 47 simulations
- Alpha Decay & Half-life 3 insideNuclei · Class 12 · JEE · NEETWatch single nuclei of polonium-211 decay at random, then hundreds at once, and see the random events add up to N = N₀ e^(−λt).radioactivityhalf lifepoloniumnuclear decay Pro
- Beta Decay & Half-life 3 insideNuclei · Class 12 · JEE · NEETA neutron turns into a proton and an electron flies out. Watch carbon-14 and hydrogen-3 decay one nucleus at a time, then in hundreds, and date a sample from what is left.beta minuscarbon-14neutrinoradioactive datinghalf life Pro
- Double-Slit: Waves & ParticlesDual Nature of Radiation and Matter · Class 12 · JEEFire photons or electrons at two slits one at a time. Each lands as a single dot — yet the dots build an interference pattern. Turn on a which-slit detector and the fringes vanish.quantum wave interferencedouble slitde broglieelectron diffractionwave particle duality Open
- Quantum Coins & Measurement 2 insideModern Physics (beyond syllabus) · Class 12 · OlympiadCompare a biased classical coin with a quantum one prepared in a superposition. Measure one, then thousands, and see how the Bloch sphere sets the odds.quantum coin tosssuperpositionbloch spherestern gerlachspinprobability Pro
- Models of the Hydrogen AtomAtoms · Class 12 · JEE · NEETShine light on a hydrogen atom and compare the classical, plum-pudding and Bohr models. Only the Bohr atom absorbs and emits the exact lines the spectrometer records.bohr modelplum puddingspectral linesbalmerlymanenergy levels Pro
- Build a NucleusNuclei · Class 12 · JEE · NEETAdd protons and neutrons and see which nucleus you made, whether it is stable, and how it decays. Find it on the chart of nuclides and follow its decay path.isotopesnuclide chartstabilityalpha decaybeta decayneutron proton ratio Pro
- Build an Atom 3 insideStructure of the Atom · Class 9 · Class 11Build an atom from protons, neutrons and electrons. See the element, its charge, its mass number and its symbol update as you go — then test yourself in the game.protonsneutronselectronsionisotopeatomic number Pro
- Rutherford ScatteringAtoms · Class 12 · JEE · NEETFire alpha particles at an atom. With a tiny positive nucleus a few bounce right back; with Thomson's plum pudding they all sail through. That is how the nucleus was found.alpha particlegold foilnucleusplum puddingimpact parameterdistance of closest approach Pro
- Photoelectric EffectDual Nature of Radiation and Matter · Class 12 · JEE · NEETShine light on a metal in a vacuum tube and watch electrons fly off — or not. Change the wavelength, intensity, metal and the anode voltage, find the stopping potential and threshold, and plot current against voltage and K_max against frequency.photoelectric effectwork functionthreshold frequencystopping potentialEinstein's photoelectric equationphotocurrent Open
- Atomic Structure Lab 31 insideStructure of Atom · Class 11 · 12 · JEE · NEETThirty-one experiments covering the whole chapter, in the order it is taught for JEE Main and Advanced: Thomson's atom and why it cannot turn an α-particle back, Rutherford's gold foil with real hyperbolic paths, the cathode-ray tube and Thomson's e/m, canal rays, why each model fails; c = νλ, the electromagnetic spectrum, Planck's quanta and photon energies; the photoelectric effect with threshold, work function, stopping potential and Einstein's equation; Bohr's postulates, radius–energy–speed, the hydrogen spectrum, emission and absorption, the five series and any transition's wavelength; de Broglie waves, electron diffraction and 2πr = nλ; and orbitals drawn from hydrogen's real wavefunctions — orbit vs orbital, the four quantum numbers, counting electrons, s, p and d shapes, nodal planes, radial and angular nodes and the radial probability curve.structure of atomatomic structurethomson modelplum pudding modelrutherford modelgold foil experiment Pro
Electronics3 labs · 7 simulations
- Doping: n-type & p-type SemiconductorsSemiconductor Electronics · Class 12 · JEE · NEETBuild a silicon crystal atom by atom. Drop in phosphorus or arsenic and a spare electron is set free; drop in boron or gallium and a hole appears. Heat it, apply a voltage, and make a p–n junction.dopingn-typep-typesemiconductorsiliconholes Pro
- P–N Junction Diode 2 insideSemiconductor Electronics · Class 12 · JEE · NEETElectrons and holes at a p–n junction: watch the depletion layer form, shrink in forward bias and widen in reverse. Plot the I–V characteristic of silicon, germanium, a Zener and an LED.diodep-n junctionforward biasreverse biasdepletion layerbarrier potential Pro
- Solar Cell 4 insideSemiconductor Electronics · Class 12 · JEE · NEETHow a solar cell works and how to get the most from it, in 3D. Photons make electron–hole pairs that the junction's field sweeps apart; drag a lamp closer or tilt the panel and watch the I–V curve move; turn the load knob to find the maximum power point; and wire cells in series or parallel and shade one to see a whole string sag.solar cellphotovoltaic cellsolar cell i-v characteristicsopen circuit voltageshort circuit currentmaximum power point Pro
Measurement & Vectors4 labs · 8 simulations
- Vector Addition 3 insideMotion in a Plane · Vector Algebra · Class 11 · JEEDrag vectors on a grid and see their sum appear tip to tail. Read magnitude, angle and components, subtract vectors, and scale them.vectorscomponentsresultanttriangle lawparallelogram lawpolar Pro
- Curve FittingStatistics · Experimental Physics · Class 11 · Class 12Drag data points and their error bars and watch the best-fit line, parabola or cubic update instantly. Read χ² and r² to judge the fit — or try fitting by hand.least squareslinear regressionbest fitchi squarecorrelationerror bars Pro
- Screw Gauge (Micrometer) 2 insideUnits and Measurements · Class 11 · JEE · NEETTurn the thimble of a screw gauge to grip a wire and read it: main-scale reading plus circular-scale divisions × least count, corrected for zero error. Then solve practice readings.micrometer screw gaugeleast countpitchzero errormain scalecircular scale Open
- Vernier Callipers 2 insideUnits and Measurements · Class 11 · JEE · NEETSlide the jaw of a vernier calliper to grip a cylinder, a sphere or a tube, read the main scale and the coinciding vernier division, and correct for zero error. Measure outside and inside diameters, then solve practice readings.vernier calipervernier callipersleast countvernier constantzero errormain scale reading Pro
Chemistry
Atomic Structure4 labs · 36 simulations
- Models of the Hydrogen AtomAtoms · Class 12 · JEE · NEETShine light on a hydrogen atom and compare the classical, plum-pudding and Bohr models. Only the Bohr atom absorbs and emits the exact lines the spectrometer records.bohr modelplum puddingspectral linesbalmerlymanenergy levels Pro
- Build an Atom 3 insideStructure of the Atom · Class 9 · Class 11Build an atom from protons, neutrons and electrons. See the element, its charge, its mass number and its symbol update as you go — then test yourself in the game.protonsneutronselectronsionisotopeatomic number Pro
- Rutherford ScatteringAtoms · Class 12 · JEE · NEETFire alpha particles at an atom. With a tiny positive nucleus a few bounce right back; with Thomson's plum pudding they all sail through. That is how the nucleus was found.alpha particlegold foilnucleusplum puddingimpact parameterdistance of closest approach Pro
- Atomic Structure Lab 31 insideStructure of Atom · Class 11 · 12 · JEE · NEETThirty-one experiments covering the whole chapter, in the order it is taught for JEE Main and Advanced: Thomson's atom and why it cannot turn an α-particle back, Rutherford's gold foil with real hyperbolic paths, the cathode-ray tube and Thomson's e/m, canal rays, why each model fails; c = νλ, the electromagnetic spectrum, Planck's quanta and photon energies; the photoelectric effect with threshold, work function, stopping potential and Einstein's equation; Bohr's postulates, radius–energy–speed, the hydrogen spectrum, emission and absorption, the five series and any transition's wavelength; de Broglie waves, electron diffraction and 2πr = nλ; and orbitals drawn from hydrogen's real wavefunctions — orbit vs orbital, the four quantum numbers, counting electrons, s, p and d shapes, nodal planes, radial and angular nodes and the radial probability curve.structure of atomatomic structurethomson modelplum pudding modelrutherford modelgold foil experiment Pro
States of Matter5 labs · 62 simulations
- Gas Properties 2 insideKinetic Theory · Thermodynamics · Class 11 · JEE · NEETPump molecules into a box and push the wall, heat it, or cool it. Watch pressure, volume and temperature follow PV = NkT — and the speed histogram spread as the gas warms.ideal gas lawpv=nrtboyle's lawcharles lawkinetic theorypressure Pro
- States of Matter 2 insideMatter · Thermal Properties · Kinetic Theory · Class 9 · Class 11Heat and cool atoms of neon, argon, oxygen or water and watch them melt, boil and condense. Squeeze the container, and see the forces between two atoms on the interaction tab.solid liquid gasphase changemeltingboilinglennard-jonesatomic interactions Pro
- Thermal Energy & Molecular Motion 4 insideThermal Properties of Matter / Kinetic Theory · Class 7–11 · JEE · NEETFour 3D experiments on what heat is at the level of particles: a box of gas whose molecules speed up as you heat it (with the Maxwell distribution and the three speeds); a cup and a bucket at different temperatures holding very different amounts of thermal energy; a hot block and a cold block touching, their particles' jiggling evening out until both reach one temperature; and why a metal bench feels colder than a wooden one at the same temperature.thermal energymolecular motiontemperature and kinetic energykinetic theoryparticles move faster when heatedaverage kinetic energy 3/2 kt Pro
- Heating Curve of Water 4 insideThermal Properties of Matter · Class 9–11 · JEE · NEETHeat a block of ice on a burner in 3D and watch it warm, melt, warm again, boil and turn to steam while the temperature–heat graph draws itself. See why the temperature stops rising during melting and boiling, read the specific heats of ice, water and steam from the slopes, and drop ice into warm water to find whether it all melts.heating curve of waterheating curveice to steamtemperature vs heat graphlatent heat of fusionlatent heat of vaporisation Pro
- Thermal Properties of Matter Lab 50 insideThermal Properties of Matter · Class 7–12 · JEE · NEETThe whole NCERT chapter as one bench: fifty experiments, each acted out in 3D by a demonstrator in a lab coat — a finger dipped in hot water and snatched back, a hot block lifted off a Bunsen burner with tongs and lowered into a calorimeter, a thermometer carried from bath to bath. Thermometry, gas laws, expansion, water's 4 °C anomaly, specific heat, calorimetry, phase changes and phase diagrams, conduction, convection, radiation, blackbody laws, Newton's cooling, and a design challenge that uses all of it.thermal properties of matterthermal properties of matter simulationclass 11 physics chapter 10heat and temperaturethermal equilibriumthermometer Pro
Chemical Bonding3 labs · 4 simulations
- States of Matter 2 insideMatter · Thermal Properties · Kinetic Theory · Class 9 · Class 11Heat and cool atoms of neon, argon, oxygen or water and watch them melt, boil and condense. Squeeze the container, and see the forces between two atoms on the interaction tab.solid liquid gasphase changemeltingboilinglennard-jonesatomic interactions Pro
- Molecules & LightDual Nature · Environment · Class 11 · Class 12Shine microwaves, infrared, visible or ultraviolet light on CO₂, H₂O, O₂, O₃ and more. See which photons are absorbed and what the molecule does — rotate, vibrate, glow or break apart.greenhouse effectinfrared absorptionuvmicrowavephoton energymolecular vibration Pro
- Doping: n-type & p-type SemiconductorsSemiconductor Electronics · Class 12 · JEE · NEETBuild a silicon crystal atom by atom. Drop in phosphorus or arsenic and a spare electron is set free; drop in boron or gallium and a hole appears. Heat it, apply a voltage, and make a p–n junction.dopingn-typep-typesemiconductorsiliconholes Pro
Organic Reactions3 labs · 9 simulations
- SN2 Reaction Mechanism 3 insideHaloalkanes & Haloarenes · Class 12 · JEE · NEETWatch a nucleophile attack an alkyl halide from the back, one step at a time: curved arrows, moving electron pairs, the transition state and the umbrella flip. Change the substrate, nucleophile, leaving group and solvent, then draw the mechanism from memory.sn2nucleophilic substitutionbimolecularbackside attackwalden inversioninversion of configuration Pro
- SN1 Reaction Mechanism 3 insideHaloalkanes & Haloarenes · Class 12 · JEE · NEETWatch tert-butyl bromide ionise to a flat carbocation, then a solvent molecule attack it from either face. See why SN1 is first order and racemises, set it beside SN2, and decide SN1, SN2, E1 or E2 for real cases.sn1unimolecular substitutioncarbocationracemisationracemizationsolvolysis Open
- E1 & E2 Elimination Reactions 3 insideHaloalkanes & Haloarenes · Class 12 · JEE · NEETWatch a base pull off a β-hydrogen as bromide leaves and a C=C forms, with three curved arrows in one step. Turn the C–C bond until H and Br are anti-periplanar, compare Zaitsev and Hofmann products, and follow E1 through its carbocation.e2e1eliminationbeta eliminationdehydrohalogenationanti periplanar Open
Stereochemistry5 labs · 14 simulations
- Geometrical Isomerism: Cis–Trans & Allenes 3 insideIsomerism · Class 11 · Class 12 · JEE · NEETBuild an alkene and try to twist its C=C: watch the π overlap fall to zero at 90°. Read cis/trans and E/Z, see why an even number of cumulated C=C makes an allene chiral, and lock or free the rings of biphenyls and terphenyls.geometrical isomerismcis trans isomerisme z nomenclaturee/zrestricted rotationallene Pro
- R/S Configuration (CIP Rules) 3 insideIsomerism · Class 11 · Class 12 · JEE · NEETAssign R or S step by step: rank by atomic number, break ties at the first point of difference, turn group 4 away and trace 1 → 2 → 3. Then decide whether two molecules are the same or mirror images, and watch one turned and reflected onto the other.r s configurationcip rulescahn ingold prelogpriority rulesabsolute configurationchiral centre Open
- Plane & Centre of Symmetry (Chirality) 3 insideIsomerism · Class 11 · Class 12 · JEE · NEETTest a plane or a centre of symmetry the honest way: send every atom through it, one at a time, and see whether an identical atom is waiting. Clear up the classic confusions — meso compounds, a centre with no plane, a C₂ axis that does not count, allenes.plane of symmetrycentre of symmetrycenter of symmetrypos cosmeso compoundchiral or achiral Pro
- Newman, Sawhorse & Fischer Projections 2 insideIsomerism · Class 11 · Class 12 · JEE · NEETSee one molecule as a Newman, a Sawhorse and a Fischer projection, and convert any one into any other step by step: the camera moves, the back carbon turns to eclipsed, the drawing flattens — and the R/S labels never change.newman projectionsawhorse projectionfischer projectioninterconversion of projectionsnewman to fischerfischer to newman Pro
- Conformations of Ethane & Butane 3 insideIsomerism · Class 11 · JEE · NEETTurn the C–C bond of ethane or butane and watch the 3D model, the Newman projection and the energy curve move together: staggered and eclipsed, anti, gauche and fully eclipsed. Then see the case where gauche beats anti.conformational isomerismconformational analysisstaggered and eclipsedanti gauche synbutane conformationsethane conformations Pro
Mathematics
Coordinate Geometry8 labs · 224 simulations
- Radical AxisCircles · Class 11 · JEEDrag two (or three) circles and watch the radical axis S₁ − S₂ = 0 move with them. Tangent lengths from any point on the axis stay equal.coaxial circlesradical centrepower of a point Pro
- Common Tangents to Two CirclesCircles · Class 11 · JEEDrag two circles apart, together and inside each other, then draw every common tangent. Watch the count go 4 → 3 → 2 → 1 → 0 as the distance between the centres d crosses r₁ + r₂ and |r₁ − r₂|.direct common tangenttransverse common tangentnumber of common tangentscentre of similitudetwo circles Pro
- Maths StudioGraphs · Application of Derivatives · Area · Triangles · Class 11 · Class 12 · JEEA graphing and geometry workspace in the spirit of GeoGebra, built for JEE. Plot any curve (y = f(x), conics, parametric, polar, with sliders). Draw the tangent and normal at any point with sub-tangent and sub-normal, every tangent or normal from an outside point, the area under or between curves with Riemann sums, a full curve-tracing analysis, and the labelled intersection points of any two curves. Then explore every centre of a triangle, and build constructions with GeoGebra's full toolbar: points, lines, circles and arcs, conics (ellipse and hyperbola from foci, four points, or a focus, directrix and e), measurements, transformations, locus, animated sliders, checkboxes and buttons, GeoGebra-style commands, and links to share your work.graphing calculatorgeogebratangent and normalsubtangentsubnormalarea under curve Pro
- Parabola Lab 28 insideConic Sections · Class 11 · JEE Main · JEE AdvancedTwenty-eight interactive modules on y² = 4ax, from the focus-directrix definition to the JEE Advanced special results. Explore, predict, derive and practise with randomised problems.parabola jee advancedfocal chordtangent to parabolanormal to parabolathree normalschord of contact Open
- Ellipse Lab 20 insideConic Sections · Class 11 · JEE Main · JEE AdvancedTwenty interactive modules on x²/a² + y²/b² = 1, from the two-pin definition to polars and the director circle. Explore, predict, derive and practise JEE problems.ellipse jeeeccentricityauxiliary circledirector circletangent to ellipsenormal to ellipse Pro
- Conic Constructions Lab 5 insideConic Sections · Class 11 · JEETrace the centre of a circle that keeps touching a line and a circle, two circles from inside and outside, or two separate circles, and watch a parabola, an ellipse and a hyperbola appear. Slide a rod down a wall, then move and turn an ellipse and see its equation gain an xy term.locusgeometric locusconic constructionparabola from circle and lineellipse from two circleshyperbola from two circles Pro
- Locus Lab 137 insideLocus & Coordinate Geometry · Class 7–12 · JEEOne lab for every kind of locus: drag the defining points, move the point and watch it trace its path, then compare the trace with the exact locus and its equation. Twelve families — basic loci, moving points and triangle centres, circle geometry, conics, algebraic curves, rolling and linkage curves, transformations, distance–angle–ratio conditions, envelopes and evolutes, 3D surfaces, complex-plane loci and polar curves — plus a JEE Advanced problem lab and a ‘draw a curve, find the condition’ tool. Every result is classified as a curve, a region, a finite set, the empty set, a degenerate locus or a surface.locuslocilocus of a pointperpendicular bisectorangle bisectorlocus of midpoint Pro
- Graphing Lab: Functions & Transformations 31 insideFunctions & Graphs · Class 9–12 · JEEThirty-one graphing lessons on one board: plot points and tables, read a graph, meet every standard function (exponential, logarithm, powers, roots, 1/x, x + 1/x, bounded rationals), then master each transformation — f(x) + a, f(x − a), a·f(x), f(ax), reflections, |f(x)|, f(|x|), |y| = f(x) — with the original graph kept in grey and every point animated to its image. Finish by building multi-step targets, guessing equations from graphs, and transforming a function you type yourself.graph transformationstransformation of graphsgraphing functionsplotting pointstable of valuescoordinate plane Pro
Calculus5 labs · 37 simulations
- Maths StudioGraphs · Application of Derivatives · Area · Triangles · Class 11 · Class 12 · JEEA graphing and geometry workspace in the spirit of GeoGebra, built for JEE. Plot any curve (y = f(x), conics, parametric, polar, with sliders). Draw the tangent and normal at any point with sub-tangent and sub-normal, every tangent or normal from an outside point, the area under or between curves with Riemann sums, a full curve-tracing analysis, and the labelled intersection points of any two curves. Then explore every centre of a triangle, and build constructions with GeoGebra's full toolbar: points, lines, circles and arcs, conics (ellipse and hyperbola from foci, four points, or a focus, directrix and e), measurements, transformations, locus, animated sliders, checkboxes and buttons, GeoGebra-style commands, and links to share your work.graphing calculatorgeogebratangent and normalsubtangentsubnormalarea under curve Pro
- Calculus GrapherDifferentiation · Integration · Class 11 · Class 12 · JEESketch any function with your finger and see its derivative, second derivative and integral drawn live. Drag a tangent along the curve and watch the area accumulate.derivativeintegraltangentslopearea under curvedifferentiation Pro
- Cycloid: Isochrone and Brachistochrone 2 insideWork, Energy and Power · Oscillations · Class 11 · JEERelease beads from different heights on a cycloid and see them reach the bottom together, then race four tracks. Find out which path is the quickest way down.brachistochronetautochroneisochrone curvefastest pathcycloid pendulum Pro
- Motion Graphs & Equations of Motion 2 insideKinematics · Class 9 · Class 11 · JEE · NEETDrive a car through a journey and watch its x–t, v–t and a–t graphs draw themselves from the same motion. Read velocity as the slope of x–t and displacement as the area under v–t, build your own journey, and test v = u + at and s = ut + ½at².position time graphvelocity time graphacceleration time graphx-t graphv-t graphslope of graph Open
- Graphing Lab: Functions & Transformations 31 insideFunctions & Graphs · Class 9–12 · JEEThirty-one graphing lessons on one board: plot points and tables, read a graph, meet every standard function (exponential, logarithm, powers, roots, 1/x, x + 1/x, bounded rationals), then master each transformation — f(x) + a, f(x − a), a·f(x), f(ax), reflections, |f(x)|, f(|x|), |y| = f(x) — with the original graph kept in grey and every point animated to its image. Finish by building multi-step targets, guessing equations from graphs, and transforming a function you type yourself.graph transformationstransformation of graphsgraphing functionsplotting pointstable of valuescoordinate plane Pro
Statistics & Probability3 labs · 6 simulations
- Curve FittingStatistics · Experimental Physics · Class 11 · Class 12Drag data points and their error bars and watch the best-fit line, parabola or cubic update instantly. Read χ² and r² to judge the fit — or try fitting by hand.least squareslinear regressionbest fitchi squarecorrelationerror bars Pro
- Plinko ProbabilityProbability · Statistics · Class 10 · Class 12Drop balls through a triangle of pegs. One ball's path is random, but a thousand pile up into the binomial distribution — change the bias and rows and watch it shift.galton boardbinomial distributionnormal distributionprobabilityhistogrammean Pro
- Buffon's Needle: A Pen Through a Window 4 insideProbability · Class 11–12 · JEEThrow needles at lines and estimate π, then throw pens at a window in 3D: what fraction pass through without touching a bar? Throw 1, 100 or 10 000 at once and watch the fraction settle on the formula — 2/(3π) ≈ 21 % for a pen as long as a pane is wide — and see why that number depends on what 'random' means.buffon's needlebuffon needle problemestimate pi by throwing needlesgeometric probabilityprobability pen through windowlaplace grid problem Pro
Biology
Human Physiology2 labs · 7 simulations
- The Cochlea & Audible RangeNeural Control and Coordination (the ear) · Sound · Class 9 · 11 · NEETSweep a tone from 20 Hz to 20 kHz and see where it makes the cochlea's basilar membrane vibrate most: high notes near the oval window, low notes at the apex. Listen, test your own upper limit, and see how it falls with age.cochleaearhearingaudible frequencyhair cellsbasilar membrane Pro
- Human Heart & Double Circulation 3D Lab 6 insideBody Fluids & Circulation · Class 10 · Class 11 · NEETA beating 3D heart wired to the lungs and the body, with blue and red blood cells flowing round both circuits. Click any chamber, valve or vessel; play double circulation, the cardiac cycle (with a live ECG and lub-dub) and the conduction system step by step; change the heart rate or add a defect; then trace a red cell and answer NEET questions.human heart 3ddouble circulationpulmonary circulationsystemic circulationheart chambersright atrium Pro