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Simple phenomena of magnetism

Simple phenomena of magnetism

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Question 11

A student wishes to demagnetise a strongly magnetised iron bar. Which of the following procedures would successfully demagnetise the bar?

A

Placing the bar inside a freezer for several days.

B

Connecting the bar to a direct current (d.c.) power supply.

C

Heating the bar strongly and then hammering it repeatedly while it is aligned in an east-west direction.

D

Stroking the bar in one direction with a woollen cloth.

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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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