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A simple pendulum has a hollow sphere co...

A simple pendulum has a hollow sphere containing mercury suspended by means of a wire. If a little mercury is drained off, the period of the pendulum will

A

remains unchanged

B

increase

C

decrease

D

become erratic

Text Solution

Verified by Experts

The correct Answer is:
B
(b) When a little mercury is drained off, the position of centre of mas of ball falls ( with respect to fixed end) so that effective length of pendulum increase hence T increase.
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