Cambridge IGCSE Combined Science practice

Paper 4 structured question: Electrical quantities

Try the question first, then check the answer and practise the same topic again.

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Paper

Marks

Topic

Electrical quantities

Exam-style question

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Paper 4Theory (Extended)2 marks

Understanding the concept of electromotive force is essential in electrical engineering.

Description

Electromotive force (e.m.f.) is the energy provided by a source per unit charge, measured in volts (V).

a
Define electromotive force (e.m.f.) and state its unit of measurement.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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Paper 4Theory (Extended)3 marks

Description

A battery provides an e.m.f. of 9 V to a circuit. This means it supplies 9 joules of energy for every coulomb of charge.

a
Explain the significance of e.m.f. in this circuit.
Your answer
Aim for approximately 3 distinct marking points.
[3]