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Cambridge IGCSE Physics practice

What increases the rotational force on a coil in a magnetic field?

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Show answerThe d.c. motor revisionRevise the key idea

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MCQ

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cambridge_mcq

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Topic

The d.c. motor

Exam-style question

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What increases the rotational force on a coil in a magnetic field?.

  1. A.Increasing the number of turns
  2. B.Decreasing the electric current
  3. C.Reducing the magnetic field strength
  4. D.None of the above

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Paper 3 structured question: The d.c. motor

Paper 3Theory (Core)1 marks

Description

Coil in a Magnetic Field

The coil has 100 turns and carries a current of 2 A in a magnetic field of strength 0.5 T.

  1. a

    State the factors that can increase the rotational force on the coil.

    Aim for approximately 1 distinct marking point.

    [1]