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Simple phenomena of magnetism

Simple phenomena of magnetism

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Question 39

Which of the following procedures would successfully demagnetise a permanent steel bar magnet?

A

Place it inside a solenoid connected to a direct current (d.c.) power supply and switch it off.

B

Cool the magnet down to a very low temperature inside a freezer for 24 hours.

C

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

D

Immerse the magnet in a beaker of pure water at room temperature.

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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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