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Q.

An iron bar becomes bar magnet when one of the poles of a bar magnet is rubbed on it several times. This is known as

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a

Magnetization

b

Electro magnetization

c

Induction

d

All the above

answer is A.

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Detailed Solution

The stroking method (touch method): A magnetic object is stroked many times by one of the

poles of the bar magnet, after some time the magnetic object will act as a magnet itself

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