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Simple phenomena of magnetism

Simple phenomena of magnetism

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Question 124

An engineer is selecting materials for two different parts of an electromagnetic lock:

  1. The electromagnet core, which needs to become magnetised when a current is switched on, but must lose its magnetism quickly when the current is switched off.
  2. The permanent latch, which must remain strongly magnetised permanently.

Which metals are the most suitable to use for the core and the latch?

A

Electromagnet core: iron; Permanent latch: iron

B

Electromagnet core: iron; Permanent latch: steel

C

Electromagnet core: steel; Permanent latch: iron

D

Electromagnet core: steel; Permanent latch: 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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