(a) Name a device that helps to measure the potential difference across a conductor.
(b) How much energy is transferred by a 12 V power supply to each coulomb of charge which it moves around a circuit?

When a charge Q moves between two points whose potential difference is V, the amount of work done is given by

$W = Q \times V$

Here, the energy transferred is nothing but work done by the battery.

$W = 12 \times 1$

$W = 12 \ joule$

So, 12 joule energy is transferred by a 12 V power supply to each coulomb of charge which it moves around a circuit

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Updated on: 10-Oct-2022

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