The terminal potential difference of a battery is less greater than its emf:
A) under all conditions
B) only when the battery is being charged
C) only when the battery is being discharged
D) only when there is no current in the battery
E) under no conditions

Question

Quizplus · Accepted Answer

The terminal potential difference of a battery is the actual voltage across its terminals during use, which is always less than the emf due to internal resistance and external factors such as the circuit's load. During discharge, the internal resistance of the battery causes a voltage drop across the battery, which reduces the terminal potential difference below the emf. Therefore, the correct choice is C, only when the battery is being discharged.

The Terminal Potential Difference of a Battery Is Less Greater