Define the unit of resistance. b) What happens to the resistance as the conductor is made thinner? c) Keeping the potential difference constant, the resistance of a circuit is doubled. By how much does the current change?

1. The unit of resistance is 1 ohm is defined as the resistance offered by the conductor such that when 1 volt potential difference is applied, then 1 ampere current flows through the conductor.

1. As the conductor is made thinner, the resistance of the conductor

1. By keeping the potential difference constant and the resistance is doubled, then V = IR

I = V/R

Then, I ∝ 1/R

Therefore, when R is doubled, I becomes half.