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A thin rectangular magnet suspended free...

A thin rectangular magnet suspended freely has a period of oscillation T in a uniform magnetic field . Now it is broken in two equal parts perpendicular to magnetic axis and one place is allowed to oscillate in the same field . If its period of oscillation is T' , then ration (T)/(T') is

A

`1//2sqrt2`

B

`1/2`

C

2

D

`1/4`

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