The percentage change in the time period of a seconds pendulum when its amplitude is reduced by 30% is:

45

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0

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27

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70

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Solution

The correct option is B $0$
As long as the pendulum is in its working range (condition for harmonic oscillation) the time period will not be affected by its amplitude change. It is independent of amplitude.

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A simple pendulum has some time period T. What will be the percentage change in its time period if its amplitude is decreased by 5 %?

21 % .

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