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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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