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Question

Choose the incorrect statement among the following.

A
A bar magnet loses its magnetic property when dropped from a certain height.
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B
A bar magnet that has been demagnetised can't be converted to a magnet again.
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C
A bar magnet which is heated beyond a certain temperature loses its magnetic property.
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D
A bar magnet loses its magnetic property when hammered repeatedly.
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Solution

The correct option is B A bar magnet that has been demagnetised can't be converted to a magnet again.
It is possible to magnetise a demagnetised magnet again by various methods like rubbing with another magnet , using two magnets for stroking ,etc.
A bar magnet loses its magnetism when:
1. Its hammered repeatedly
2. Dropped from a certain height
3. Heated at and beyond its curie temperature.

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