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Q.

A bar magnet of pole strength q and magnetic moment m is divided into two equal pieces by cutting it along· its length. Then

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a

q remains the same but m is halved

b

q and m both are halved

c

q is halved but m remains the same

d

q is halved and m is doubled

answer is B.

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Detailed Solution

When a magnet is cut along its length, The resulting magnets will have a pole strength that is half of the original value. As the length is same magnetic moment will also be half of the original value.

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