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Cambridge IGCSE Physics practice

Paper 4 structured question: The transformer

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Attempt questionThe transformer revisionRevise the key idea

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The transformer

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Paper 4Theory (Extended)3 marks

Transformers are widely used in power systems.

Description

Transformer Functionality

A transformer can either step up or step down voltage levels depending on the turns ratio of its coils. The primary coil is connected to the power source, while the secondary coil delivers the transformed voltage to the load.

  1. a

    Explain how the turns ratio affects the voltage output of a transformer.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 4 structured question: The transformer

Paper 4Theory (Extended)1 marks

Description

Transformer Operation

A transformer consists of two coils of wire, the primary and secondary, wound around an iron core. When an alternating current flows through the primary coil, it generates a changing magnetic field that induces a voltage in the secondary coil.

  1. a

    State the principle that allows a transformer to operate.

    Aim for approximately 1 distinct marking point.

    [1]