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

ELECTROMAGNETIC INDUCTION

15 practice questions

Start practising (15 questions)

Practice questions

11–15 of 15

  1. Question 11

    1 mark · Normal

    Which of the following will NOT increase the size of the voltage induced in a wire by electromagnetic induction?

    1. A.Using a stronger magnet
    2. B.Moving the wire faster across the magnetic field
    3. C.Increasing the number of turns in the coil
    4. D.Using a weaker magnet
    Answer and check →

  2. Question 12

    3 marks · Normal

    A student investigates how the induced voltage in a coil changes with the speed of a moving magnet. Her results are shown in the table.

    Induced voltage vs. speed of magnet
    Speed of magnet (cm/s)Induced voltage (V)
    20.6
    41.2
    61.8
    82.4
    (a)

    Describe the relationship between speed and induced voltage shown by the data.

    [1 mark]
    (b)

    Predict the induced voltage if the speed of the magnet is increased to 10 cm/s.

    [2 marks]
    Answer and see the solution →

  3. Question 13

    3 marks · Normal

    When a magnet is pushed into a coil of wire, a voltage is produced across the ends of the coil. The voltage disappears if the magnet stops moving.

    (a)

    Explain why a voltage is only induced when the magnet is moving.

    [2 marks]
    (b)

    Give one way to increase the maximum voltage produced in this experiment.

    [1 mark]
    Answer and see the solution →

  4. Question 14

    4 marks · Normal

    A portable generator is used at a roadworks site to provide electrical power. The generator has a coil rotating inside a strong magnetic field.

    Describe how electricity is produced in this generator and state two factors that will increase the amount of electricity generated.

    (a)

    Describe what happens as the generator coil turns inside the magnetic field.

    [2 marks]
    (b)

    State two ways the amount of electricity generated can be increased.

    [2 marks]
    Answer and see the solution →

  5. Question 15

    3 marks · Normal

    You are given a coil of wire, a bar magnet, and a sensitive voltmeter.

    Describe a practical experiment to show electromagnetic induction and how you would demonstrate that the induced voltage depends on the speed of movement.

    (a)

    Describe how you would set up the apparatus to show an induced voltage.

    [1 mark]
    (b)

    Describe what you would do to investigate how the induced voltage changes with speed.

    [2 marks]
    Answer and see the solution →