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Cambridge IGCSE Physics practice

Paper 4 structured question: The d.c. motor

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The d.c. motor

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Paper 4Theory (Extended)4 marks

Understanding the operation of electric motors is crucial for various engineering applications.

Description

Operation of Electric Motors

Electric motors convert electrical energy into mechanical energy through the interaction of magnetic fields and electric currents.

  1. a

    Describe how an electric motor functions, focusing on the roles of the coil, magnetic field, and commutator.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 4 structured question: The d.c. motor

Paper 4Theory (Extended)4 marks

Description

Electric Motor Components

An electric motor consists of a coil, a magnetic field, a split-ring commutator, and brushes. The coil is placed within the magnetic field and is connected to a power source.

  1. a

    Explain the function of the split-ring commutator and brushes in an electric motor.

    Aim for approximately 4 distinct marking points.

    [4]