#### 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.

#### Solution

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.

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Solution 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. Concept: Electric Potential Difference.