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Simple phenomena of magnetism

Simple phenomena of magnetism

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Question 107

An engineer is designing two components:

  1. The core of an electromagnet, which needs to become strongly magnetized when current flows but quickly demagnetize when the current is turned off.
  2. A permanent magnet for a loudspeaker, which must retain its magnetization for a long period.

Which metals are most suitable for these two components?

A

Electromagnet core: iron; Permanent magnet: iron

B

Electromagnet core: steel; Permanent magnet: iron

C

Electromagnet core: iron; Permanent magnet: steel

D

Electromagnet core: steel; Permanent magnet: steel

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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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