Q.

If a magnet of pole strength m is divided into four parts such that the length and width of each part is half that of initial one, then the pole strength of each part will be

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a

m/4

b

m/2

c

m/8

d

4m

answer is B.

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Detailed Solution

For each part, m'=m2
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If a magnet of pole strength m is divided into four parts such that the length and width of each part is half that of initial one, then the pole strength of each part will be