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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

Electric motors are widely used in various applications, from household appliances to industrial machinery.

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]

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Paper 4 structured question: The d.c. motor

Paper 4Theory (Extended)4 marks

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]