About the Heat Flow Through Rods: Series & Parallel simulation
Conduction through rods is the JEE and NEET heat-transfer topic that is really a circuit problem in disguise. This 3D simulation puts rods between a bath of boiling water and a box of melting ice; each rod glows by temperature from red to blue and its heat current flows along it as moving dots — fast in copper, barely moving in wood. Change the material, length and cross-section and watch Fourier's law, H = kAΔT/L, while the ice at the cold end melts at H/L_f.
Join two rods end to end and find the junction temperature: the same current passes through both, so the poorer conductor takes the larger share of the temperature drop and the profile has a kink at the joint. Put two side by side and their currents add. Write R = L/kA as a thermal resistance and these become the series and parallel rules of electric circuits, with equivalent conductivities for each.
The last module meets three rods from three baths at one junction — the node method: the junction settles where the heat flowing in equals the heat flowing out, T_j = Σ(T/R)/Σ(1/R). Every module has a prediction, a derivation, concept questions and fresh numericals.
Also covers: heat conduction, thermal conductivity, fourier's law, heat current, rate of heat flow, kaδt/l, thermal resistance, l/ka, rods in series, rods in parallel, equivalent thermal conductivity, junction temperature, temperature gradient, three rods junction, y junction rods, ice melting by rod, steady state conduction, electrical analogy of heat flow, class 11 thermal properties, jee heat transfer.
