Q.

An artificial satellite moves in a circular orbit around the earth. Total energy of the satellite is given by E. The potential energy of the satellite is

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a

-2 E

b

2E

c

2E3

d

-2E3

answer is B.

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Detailed Solution

We know that, the potential energy of the satellite,U=-GMemReThe kinetic energy of the satellite,   K=12GMemReThe total energy,  E=U+K=-GMemRe+12GMemRe=-12GMemRe⇒  2E=-GMemRe⇒-2E=USo, potential energy =  2 (total energy)⇒ PE=2E
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An artificial satellite moves in a circular orbit around the earth. Total energy of the satellite is given by E. The potential energy of the satellite is