Question:medium

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

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Logic Tip: The mass of the bob does not affect the time period of a simple pendulum, only the \textit{distribution} of that mass does! The shifting water acts as a moving weight inside the bob that temporarily elongates the pendulum's effective center of gravity.
Updated On: Apr 28, 2026
  • is a constant.
  • decreases with time.
  • increases with time.
  • first increases and then decreases, finally having same value as at the beginning.
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The Correct Option is D

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