Cambridge IGCSE Physics practice

Paper 4 structured question: Magnetic effect of a current

Try the question first, then check the answer and practise the same topic again.

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Paper

Marks

Topic

Magnetic effect of a current

Exam-style question

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Paper 4Theory (Extended)3 marks

Understanding solenoids is crucial for applications in electromagnetism.

Description

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

a
Explain how the direction of the magnetic field in a solenoid can be determined.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 4Theory (Extended)1 marks

Description

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

a
State the effect of increasing the current on the magnetic field strength around the wire.
Your answer
Aim for approximately 1 distinct marking point.
[1]