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Question: Answered & Verified by Expert
A rubber ball filled with water, having a small hole is used as the bob of a simple pendulum. The time period of such a pendulum
PhysicsOscillationsMHT CETMHT CET 2023 (09 May Shift 1)
Options:
  • A is a constant
  • B decreases with time
  • C increases with time
  • D first increases and then decreases, finally having same value as at the beginning
Solution:
2961 Upvotes Verified Answer
The correct answer is: first increases and then decreases, finally having same value as at the beginning
$\text { From } T=2 \pi \sqrt{\frac{L}{g}}$
The effective length increases due to this flow of water. Therefore, $\mathrm{T}$ increases. As the water flows out, the length decreases and becomes equal to the original length. Hence, the time period becomes equal to the value at the beginning.

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