Assertion :Time period of a simple pendulum is independent of the length of the simple pendulum. Reason: Time period of a simple pendulum is the number of oscillations made by it in one second.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
The time period of a simple pendulum is given by ,
$T = 2 π \sqrt{l / g}$
where $l =$ effective length of simple pendulum ,
Hence , it is clear that time period depends on length of simple pendulum , so assertion is incorrect .
Now , time period of a simple pendulum is defined as the time taken by pendulum to complete one oscillation . Number of oscillations made by pendulum in one second is called its frequency .Hence reason is also incorrect .

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