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Q.

The time period of a simple pendulum is 2 sec. If its length is increased 4 times, then its period becomes

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a

16 sec

b

12 sec

c

8 sec

d

4 sec

answer is D.

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Detailed Solution

T∝l⇒T1T2=l1l2⇒2T2=l4l⇒T2=4sec
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