Question
Class 10PhysicsElectricity

State Ohm's Law and how to verify it

Verified Answer

Statement: At constant temperature, the current (I) through a conductor is directly proportional to the potential difference (V) across its ends.

V ∝ I → V = IR

Verification:

  1. Connect resistor in series with battery, rheostat, and ammeter. Connect voltmeter across resistor.

  2. Vary the rheostat; note V and I at each setting.

  3. Calculate V/I each time if it's constant, Ohm's Law is verified.

  4. Plot V vs I → a straight line through origin confirms it. Slope = R.