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A small circular loop of conducting wire...

A small circular loop of conducting wire has radius a and carries current I.It is placed in a uniform magnetic firld B perpendicular to ists place such that when rotated slightly about its diameter and rleasaed, it starts performing simple harmonic motion of time period T. If the mass of the loop is m then :

A

`2sqrt((pim)/(IB))`

B

`sqrt((2pim)/(IB))`

C

`2sqrt((m)/(pi IB))`

D

`sqrt((m)/(pi IB))`

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The correct Answer is:
B
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