Cambridge IGCSE Physics practice

Paper 3 structured question: Electromotive force and potential difference

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Electromotive force and potential difference

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Paper 3Theory (Core)3 marks

In a circuit, the e.m.f. is provided by the battery.

Description

A battery has an e.m.f. of 9V. This means it provides energy to the charges moving through the circuit.

a
Explain what is meant by the term electromotive force (e.m.f.) in the context of this battery.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)1 marks

Description

Electromotive force (e.m.f.) is the energy supplied by a source per unit charge. It is crucial for the functioning of electrical circuits.

a
State the unit of measurement for electromotive force.
Your answer
Aim for approximately 1 distinct marking point.
[1]