(a) Name a device that helps to measure the potential difference acros

1.	(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 ?
Answer» 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.

(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 ?

Answer»

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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(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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