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Question
Which of the following ways will NOT cause a permanent magnet to lose its magnetism?
Which of the following ways will NOT cause a permanent magnet to lose its magnetism?
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Solution
The correct option is D Coating it with a layer of oil
On coating a magnet with a layer of oil, the magnet does not lose its magnetism. Ferromagnetic materials lose their magnetism if heated above a point known as the Curie temperature. Similarly, passing current through it or repeatedly hitting it with a hammer, can lead to loss of magnetism.
On coating a magnet with a layer of oil, the magnet does not lose its magnetism. Ferromagnetic materials lose their magnetism if heated above a point known as the Curie temperature. Similarly, passing current through it or repeatedly hitting it with a hammer, can lead to loss of magnetism.
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