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Cambridge IGCSE Physics practice

Paper 3 structured question: Magnetic effect of a current

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Magnetic effect of a current

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Paper 3Theory (Core)1 marks

Magnetic fields created by currents.

Description

Magnetic Field Around a Wire

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

  1. a

    State the direction of the magnetic field around the wire when the current flows from positive to negative.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Magnetic effect of a current

Paper 3Theory (Core)3 marks

Description

Magnetic Field of a Solenoid

A solenoid is a coil of wire that generates a magnetic field when current flows through it. The field inside the solenoid is strong and uniform.

  1. a

    Describe the characteristics of the magnetic field produced by a solenoid.

    Aim for approximately 3 distinct marking points.

    [3]