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Q.

For a geostationary satellite orbiting around the earth identify the necessary condition.

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a

it period of revolution must be 2πRg, where R is the radius of earth

b

it must lie in the equatorial plane of earth

c

its period of revolution must be 24 hrs

d

its height from the surface of earth must be 36000km

answer is A, B, D.

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Detailed Solution

Direction of rotation of geostationary satellite and direction of rotation of earth around its own axis must be the same .

Line of action of earth's gravitational pull on geostationary satellite must lie iie in the orbital plane of the satellite 

Height of geostationary satellite above the surface of earth  h = gR2T24π213-R = 36000 km

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