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The period of oscillations of a magnet is 2 s. When it is remagnetised so that the pole strength is 4 times, its period will be

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4 s
2 s
1 s
12 s

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detailed solution

Correct option is C

T∝1M⇒T∝1mIf m → 4 times, then T→12 times i.e., T'=T2=22=1 s

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