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Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit

Electricity

249 practice questions

Start practising (121 questions)

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Practice questions

121–121 of 121 · Easy

  1. Question 121

    4 marks · Easy

    The lamp in a student’s desk light has a voltage of 12 V across it and a current of 0.5 A flowing through it when switched on. The lamp is connected to the mains using a plug that contains a fuse and a live, neutral and earth wire.

    (a)

    Calculate the power output of the lamp.

    [1 mark]
    (b)

    Name which wire the switch and fuse are always connected to and give a reason.

    [1 mark]
    (c)

    Explain how the fuse works to protect the appliance.

    [1 mark]
    (d)

    State one reason double insulation can make the earth wire unnecessary.

    [1 mark]
    Answer and see the solution →