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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)1 marks

Understanding the concept of electromotive force in circuits.

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Electromotive Force in Circuits

A battery provides an electromotive force (e.m.f.) of 9V. This means that for every coulomb of charge, the battery supplies 9 joules of energy.

  1. a

    State the unit of electromotive force.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Electromotive force and potential difference

Paper 3Theory (Core)1 marks

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E.m.f. and Current

A circuit with a battery of e.m.f. 12V and a resistance of 4 ohms is connected. Calculate the current flowing through the circuit.

  1. a

    State the formula used to calculate current in this circuit.

    Aim for approximately 1 distinct marking point.

    [1]