(a) Name a device that helps to measure the potential difference across a conductor.
(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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Solution :
(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.
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