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A pendulum has time period T in air when...

A pendulum has time period `T` in air when it is made to oscillate in water it acquired a time period `T = sqrt(2)T` The density of the pendulum bob is equal to (density) of water `= 1)`

A

`sqrt2`

B

2

C

`2sqrt2`

D

none of these

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The correct Answer is:
B
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