Two magnets A and B of the same dimensions and mass are made to oscillate in the same magnetic field. A performs 15 vibrations per minute and B, 10 vibrations per minute. The magnetic moments of the two magnets are in the ratio of

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answer is C.

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Detailed Solution

T=2πIMB=1n or n∝M or n2∝M ∴nAnB2=MAMB or 15102=MAMB or MAMB=322=94

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