A simple pendulum has a time period T1 when on the earth's surface and T2 when taken to a height 2R above the earth's surface, where R is the radius of the earth. The value of (T1T2) is:
A
19
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B
13
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C
√3
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D
9
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Solution
The correct option is B13 T1=2π√lg g′=gR2(R+h)2=gR2(R+2R)2 ∵h=2R g′=g9 T2=2π
⎷lg9 T2=2π√9l3=3T1, T1T2=13