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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 various applications, including electromagnets and electric motors.

Description

Magnetic Field Around a Wire

A straight wire carries an electric current. The magnetic field around the wire can be observed using iron filings or a magnetic compass.

  1. a

    State how the strength of the magnetic field varies with distance from the wire.

    Aim for approximately 1 distinct marking point.

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Paper 4 structured question: Magnetic effect of a current

Paper 4Theory (Extended)1 marks

Description

Magnetic Field Inside a Solenoid

A solenoid is a coil of wire that produces a magnetic field when an electric current passes through it. The field inside the solenoid is uniform and strong, while outside it is weak.

  1. a

    State the characteristics of the magnetic field inside a solenoid.

    Aim for approximately 1 distinct marking point.

    [1]