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Q.

A satellite which is geostationary in a particular orbit is taken to another orbit. Its distance from the centre of earth in new orbit is 2 times that of the earlier orbit. The time period in the second orbit is

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a

4.8 hours

b

242hours

c

24 hours

d

482hours

answer is B.

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Detailed Solution

T∝r3/2 .

 If r becomes double then time period will becomes (2)3/2 times.

So new time period will be 24×22 hr i.e. T=482

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