When a magnetic substance is heated, then it

Losses its magnetism

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Becomes a strong magnet

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Does not effect the magnetism

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Either (a) or (c)

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Solution

The correct option is A Losses its magnetism
Explanation :
When we heat a magnet, the alignment of the magnetic domains and hence their magnetic dipole will be disturbed. This means that the magnetic dipoles will get randomly aligned and net magnetic moment will be destroyed. As a result of which the magnet will be demagnetized.

Hence, option (B) is correct.

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