Induced magnetism
2 marks · EasyA steel needle and an iron nail are both placed in a magnetic field. After removing the field, what will happen to their magnetism? Explain your answer.
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The steel needle will retain some magnetism (remains slightly magnetised); the iron nail will lose its magnetism.
Also accept: Steel: keeps some magnetism. Iron: loses magnetism.
Common mistakes: Saying both become unmagnetised.
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Marking points
B1 · 1 mark · States steel keeps some magnetism or is magnetically hard.
B2 · 1 mark · States iron loses its magnetism or is magnetically soft.
Worked solution
When the field is removed, the iron nail (magnetically soft) loses its magnetism, but the steel needle (magnetically hard) keeps some magnetism.