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Cambridge IGCSE Combined Science practice

Paper 4 structured question: Electrical quantities

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Electrical quantities

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Paper 4Theory (Extended)2 marks

Understanding the concept of electromotive force in circuits.

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Electromotive Force in Circuits

Electromotive force (e.m.f.) is a key concept in electrical circuits, representing the energy supplied by a source to move charges.

  1. a

    Define electromotive force (e.m.f.) in your own words.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 4 structured question: Electrical quantities

Paper 4Theory (Extended)2 marks

Description

Practical Application of E.m.f.

Consider a circuit with a battery providing an e.m.f. of 12V. This means the battery does 12 joules of work to move 1 coulomb of charge around the circuit.

  1. a

    Explain the significance of e.m.f. in this circuit.

    Aim for approximately 2 distinct marking points.

    [2]