A geo-stationary stellite orbits around ...

A geo-stationary stellite orbits around the earth in a circular orbit of radius 36,000km. Then, the time period of a spy stellite orbitting a few hundred km above the earth's surface `(R_(earth) = 6400km)` will approximately be

1/2 hr

1hr

2hr

4hr

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The correct Answer is:

(c ) A satellite revoling near the earth's surface has a time period of 84.6 min.
`:. T_s =2 hr`

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