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Simple phenomena of magnetism

Simple phenomena of magnetism

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Question 141

An electromagnet is to be constructed. A core material is needed that becomes magnetic when a current flows in the coil, but loses its magnetism quickly when the current is switched off.

Which row gives the correct material to use for the core and the correct reason for choosing this material?

A

Material: steel; Reason: easy to demagnetise

B

Material: steel; Reason: hard to demagnetise

C

Material: soft iron; Reason: easy to demagnetise

D

Material: soft iron; Reason: hard to demagnetise

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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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