The time period of a second's pendulum is 2 sec. The spherical bob which is empty from inside has a mass of 50 gm. This is now replaced by another solid bob of same radius but having different mass of 100 gm. The new time period will be

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4 sec

1 sec

2 sec

8 sec

answer is C.

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Detailed Solution

T=2πlg (Independent of mass)

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