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Two magnetic bars oscillate in a uniform...

Two magnetic bars oscillate in a uniform magnetic field with time period 3s and 4s. If moment of inertia of both bars are 2kgm^2 and 3 kgm^2 resp. then find ratio of their magnetic moments.

A

a.32/27

B

b.16/25

C

c.42614

D

d.64/27

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