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13/07/2021 5:12 pm
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(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?
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13/07/2021 5:13 pm
(a) Voltmeter
(b) Given : Potential difference = 12V, Charge moved = 1C
We know that,
Work done = Potential difference x charge moved
= 12 x 1 = 12 joules
Since work done on each coulomb of charge is 12 joules, the energy given to each coulomb of charge is also 12 joules.