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Simple phenomena of magnetism

Simple phenomena of magnetism

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Question 23

Which of the following would be the most effective method to demagnetise a permanently magnetised steel bar?

A

Place the bar inside a solenoid connected to a large direct current (d.c.) and then switch the current off.

B

Place the bar inside a solenoid connected to an alternating current (a.c.) and slowly withdraw the bar.

C

Stroke the bar repeatedly with the north pole of a strong permanent magnet in a single direction.

D

Align the bar in a north-south direction and hit it gently with a soft rubber mallet.

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Simple phenomena of magnetism Questions

  1. IGCSE
  2. /Physics
  3. /Simple phenomena of magnetism

169 exam-style questions on CIE IGCSE Physics Simple phenomena of magnetism, covering Simple phenomena of magnetism. Each one has a worked solution and a mark scheme showing where the marks go.

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