Induced magnetism
3 marks · EasyThe picture below shows three iron paperclips hanging from the end of a bar magnet.
Explain why the paperclips are able to stick to each other.
Suggest what will happen if the magnet is taken away from the top of the row of paperclips.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) Magnetism is induced in each paperclip by the magnetic field, turning them into temporary magnets so they can attract the next paperclip.
(b) They will lose their magnetism and fall apart.
Show mark scheme and worked solution
Marking points
M1 (a) · 1 mark · Mentions magnetism is induced in the paperclips by the magnet.
A1 (a) · 1 mark · States that each paperclip then acts as a magnet, allowing the next to stick.
B1 (b) · 1 mark · States the paperclips will lose their magnetism and fall apart when the magnet is removed.
Worked solution
a) The magnetic field from the magnet induces magnetism in the first paperclip, which then induces magnetism in the next, and so on. As a result, the paperclips act like temporary magnets and stick together. b) When the magnet is removed, the induced magnetism disappears and the paperclips drop apart.