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

Magnetism and Electromagnetism

293 practice questions

Start practising (139 questions)

Topics covered

Practice questions

101–110 of 139 · Easy

  1. Question 101

    1 mark · Easy

    What is the typical voltage in household sockets after passing through a step-down transformer in the UK?

    1. A.400,000 V
    2. B.25,000 V
    3. C.230 V
    4. D.9 V
    Answer and check →

  2. Question 102

    1 mark · Easy

    Name the type of transformer used to increase voltage for transmission in the National Grid.

    Answer and see the solution →

  3. Question 103

    2 marks · Easy

    Describe what happens to the voltage and the current when electrical energy passes through a step-down transformer near a town.

    (a)

    State what happens to the voltage.

    [1 mark]
    (b)

    State what happens to the current.

    [1 mark]
    Answer and see the solution →

  4. Question 104

    1 mark · Easy

    Explain why power lines of the National Grid are placed high above the ground.

    Answer and see the solution →

  5. Question 105

    2 marks · Easy

    The transmission lines carry electricity at a low current. Give two reasons why this is an advantage in the National Grid.

    (a)

    Reason 1:

    [1 mark]
    (b)

    Reason 2:

    [1 mark]
    Answer and see the solution →

  6. Question 106

    1 mark · Easy

    Which part of the National Grid comes immediately after electricity is generated at a power station?

    1. A.Step-down transformer
    2. B.Transmission cables
    3. C.Step-up transformer
    4. D.Domestic fuse box
    Answer and check →

  7. Question 107

    5 marks · Easy

    A transformer is used in a small wind turbine system to supply electricity from the generator to a farmhouse.

    (a)

    Describe how a transformer works, including its main parts.

    [2 marks]
    (b)

    State why an alternating current (a.c.) is necessary for a transformer to work.

    [1 mark]
    (c)

    Explain how using a transformer in a National Grid system helps reduce energy losses during transmission.

    [2 marks]
    Answer and see the solution →

  8. Question 108

    4 marks · Easy

    A coil of wire is connected to a sensitive ammeter as shown. A bar magnet is moved into and out of the coil.

    Geometry diagram with points Coil, MagnetCoilMagnet
    Magnet and coil apparatus.
    (a)

    State what effect moving the magnet into the coil has on the ammeter reading.

    [1 mark]
    (b)

    Explain why a current is induced in the coil when the magnet is moved.

    [2 marks]
    (c)

    State two changes you could make to increase the size of the induced current.

    [1 mark]
    Answer and see the solution →

  9. Question 109

    1 mark · Easy

    State what happens if a wire is moved at right angles across a magnetic field.

    Answer and see the solution →

  10. Question 110

    1 mark · Easy

    Which change will NOT increase the voltage induced when moving a magnet into a coil?

    1. A.Moving the magnet faster
    2. B.Using a coil with more turns
    3. C.Using a weaker magnet
    4. D.Using a stronger magnet
    Answer and check →