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Q.

Is it true that a magnet can be demagnetized by heating or hammering?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
The magnets can lose their magnetism if they are not handled cautiously. The magnets should be stored properly in order to prevent their demagnetization. When we heat a magnet, it causes distortion in the magnet and the poles get displaced and hence the material is demagnetized. When we repeatedly hammer on a magnet, the poles get disturbed, lose their orientation, and thus magnetic moments no longer exist. Thus the magnet will get demagnetized.
 
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