Question

The potential difference required to pass a current $0.2A$ in a wire of resistance $20$ ohm is .............

• A. 100 V
• B. 4 V
• C. 0.01 V
• D. 40 V

Answer 1

Answer: (B)

4 V

Potential difference, $V=I\times R=0.2\times 20=4V$

Therefore, the potential difference required to pass a current of $0.2A$ in a wire of resistance $20$ ohms is $4V$.

Potential difference is the difference in potential between two points that represents the work involved or the energy released in the transfer of a unit quantity of electricity from one point to the other.