Q.

The time period of a satellite in a circular orbit of radius R is T. The period of another satellite in a circular orbit of radius 9R is:

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a

9T

b

27T

c

12T

d

3T

answer is B.

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Detailed Solution

T2 ∝    r3 ⇒T1T22    =  r1r23 ⇒TT22    =  R9R3  ⇒T2=27T
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