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-- Two geometrically similar magnets having same mass but magnetic moments M1 and M2 (M1 > M2) are taken and vibrate in a vibration magnetometer with their like poles together and unlike poles together. If the ratio of their time periods in both cases respectively is 1/2, then ratio of M1 to M2 is:
A
15/17
B
17/15
C
12/13
D
13/12
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