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Standard XII
Physics
Question

Which is not a necessary assumption for simple pendulum
  1. in-extensible, light and flexible string.
  2. heavy but small sized sphere (bob).
  3. angular displacement from the mean position is very less.
  4. volume of the bob is negligible.

A
in-extensible, light and flexible string.
B
heavy but small sized sphere (bob).
C
volume of the bob is negligible.
D
angular displacement from the mean position is very less.
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Solution
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All the other three option are important assumption used in while deriving the time period of Simple Harmonic Motion.

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