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A thin uniform rod of length l is pivote...

A thin uniform rod of length l is pivoted at its upper end. It is free to swing in a vertical plane. Its time period for oscillation of small amplitude is

A

`2pi sqrt(l//g)`

B

`2pi sqrt(2l//3g)`

C

`2pi sqrt(3l//2g)`

D

`2pi sqrt(l//2g)`

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The correct Answer is:
B
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