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Question

A simple pendulum has a time period T1 when on 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 T2T1 is


A

1

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B

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C

4

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D

2

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Solution

The correct option is D

2


If acceleration due to gravity is g at the surface of earth then at height R it value becomes g=g(RR+h)2=g4
T1=2πlg and T2=2πlg4 T2T1=2


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