Question

Calculate the potential difference between the two terminals of a battery if 100 joules of work is required to transfer 20 coulombs of charge from one terminal of the battery to the other.

Answer 1

In the given problem:

Work, W =100 J

Charge, Q = 20 C

W = QV

∴ V = `W/Q=100/20` = 5V

Therefore, the potential difference between the two terminals of a battery is
5 V.