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Cambridge IGCSE Physics practice

Paper 4 structured question: Magnetic effect of a current

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Magnetic effect of a current

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Paper 4Theory (Extended)1 marks

Magnetic fields are essential in understanding electromagnetism.

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Magnetic Field Around a Wire

A straight wire carries an electric current. The current can be increased or reversed.

  1. a

    State the effect of increasing the current on the magnetic field strength around the wire.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Magnetic effect of a current

Paper 4Theory (Extended)3 marks

Description

Magnetic Field in a Solenoid

A solenoid is created by winding a wire into a coil. When current flows through it, a magnetic field is produced.

  1. a

    Explain how the direction of the magnetic field in a solenoid can be determined.

    Aim for approximately 3 distinct marking points.

    [3]