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Cambridge IGCSE Physics practice

Paper 3 structured question: Energy resources

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

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3

Paper

1

Marks

Topic

Energy resources

Exam-style question

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Paper 3Theory (Core)1 marks

Energy transfer in an electrical device.

Description

Electrical Device Efficiency

An electrical device uses 500 J of energy input and produces 300 J of useful work.

  1. a

    State the efficiency of the electrical device.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Energy resources

Paper 3Theory (Core)1 marks

Description

Heating System Efficiency

A heating system uses 1000 J of energy input to produce 800 J of useful heat energy.

  1. a

    State the efficiency of the heating system.

    Aim for approximately 1 distinct marking point.

    [1]