Gravitation Question 188

Question: The rotation period of an earth satellite close to the surface of the earth is 83 minutes. The time period of another earth satellite in an orbit at a distance of three earth radii from its surface will be[MP PMT 1994]

Options:

A) 83 minutes

B) [83×8] minutes

C) 664 minutes

D) 249 minutes

Show Answer

Answer:

Correct Answer: C

Solution:

For first satellite [r1=R] and [T1=83 minute] For second satellite [r2=4R] [T2=T1(r2r1)3/2=T1(4)3/2=8T1=8×83] =664 minutes



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