MCQOPTIONS
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| 1. |
A simple pendulum is made of a body which is a hollow sphere containing mercury suspended by means of a wire. If a little mercury is drained off, the period of pendulum will (NCERT 72) |
| A. | Remain unchanged |
| B. | Increase |
| C. | Decrease |
| D. | Become erratic |
| Answer» C. Decrease | |