Electricity · Physics

Ohm's Law V–I Graph: Class 10 Virtual Lab

Study 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.

Interactive virtual lab · no download · works on phones and laptops

Chapter: Electricity · Class 10 Practical
For: Class 10 · CBSE practical
Time: ~20 min

Ohm's Law Practical: V–I Graph of a Resistor is a Pro simulation

Pro opens all 152 virtual labs — 693 simulations with guides and quizzes.

How to use it

1Step through with Next; at “Five readings” set the cells and the rheostat.
2Close the key, read both meters and record; spread the readings out.
3Open “V–I graph” for the plot and its slope.

What to notice

V/I stays the same at every reading: Ohm's law.
The V–I graph is a straight line through the origin; its slope is R.
Keep the key open between readings so the resistor does not heat up.

For teachers

A ready-made teaching kit comes with this lab

Lesson plan
25 min, 4 steps
Ask the class
4 questions with answers
Quick quiz
6 questions, printable
Key formulas
2 formulas

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About the Ohm's Law Practical: V–I Graph of a Resistor simulation

The CBSE Class 10 practical “to study the dependence of potential difference (V) across a resistor on the current (I) passing through it and determine its resistance; also plot a graph between V and I” — here as an online virtual lab.

Change the current with the rheostat and the number of cells, read the analog voltmeter and ammeter to their least counts, and take five readings. V/I comes out the same each time, and the V–I graph is a straight line through the origin whose slope is the resistance.

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