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Simple phenomena of magnetism

Simple phenomena of magnetism

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Question 78

Which of the following methods can be used to demagnetise a permanent steel bar magnet?

A

Cool the magnet to a very low temperature.

B

Place the magnet inside a solenoid connected to an alternating current (a.c.\text{a.c.}a.c.) supply and slowly withdraw it.

C

Place the magnet inside a solenoid connected to a direct current (d.c.\text{d.c.}d.c.) supply.

D

Stroke the magnet repeatedly from one end to the other with a piece of unmagnetised soft iron.

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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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