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Questions  

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

a
16 sec
b
12 sec
c
8 sec
d
4 sec

detailed solution

Correct option is D

T∝l⇒T1T2=l1l2⇒2T2=l4l⇒T2=4sec

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A simple pendulum has time period T1. The point of suspension is now moved upward according to equation y=kt2  where k=1m/sec2. If new time period is T2 then ratio T12T22  will be


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