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Questions  

A simple pendulum has a time period T1, when on the earth's surface and T2, when taken to a height R above the earth's surface, where .R is the radius of the earth. The value of T2 /T1, is

a
1
b
2
c
4
d
2

detailed solution

Correct option is D

Here, g′=gRR+R2=g4We know that T∝1/g∴ T2T1=gg/4=2

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