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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

Descrease

D

Become erratic

Text Solution

Verified by Experts

The correct Answer is:
B
When a little mercury is drained off, the position of centre of gravity of ball falls.
Hence, effective length of pendulum increases hence T increases.
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