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Q.

The ratio of energy required to raise a satellite upto a height 2R above the earth surface (R=radius of earth) to the magnitude of total energy of satellite revolving in an orbit at that height is

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a

3 : 1

b

5 : 2

c

2 : 3

d

4 : 1

answer is C.

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Detailed Solution

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E1=GMm(1R−13R)⇒E1=2GMm3R

E2=|−GMm6R|⇒E1=E2=4:1

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