A geo-stationary satellite orbits around the earth in a circular orbit of radius $$36,000\,km.$$ Then, the time period of a spy satellite orbiting a few hundred km above the earth's surface $$\left( {{R_{{\text{earth}}}} = 6,400km} \right)$$ will approximately be
A.
$$\frac{1}{2}hr$$
B.
$$1\,hr$$
C.
$$2\,hr$$
D.
$$4\,hr$$
Answer :
$$2\,hr$$
Solution :
A satellite revolving near the earth's surface has a time period of $$84.6\,\min.$$
We know that as the height increases, the time period increases. Thus the time period of the spy satellite should be slightly greater than 84.6 minutes.
$$\therefore {T_s} = 2\,hr$$
Releted MCQ Question on Basic Physics >> Gravitation
Releted Question 1
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A geo-stationary satellite orbits around the earth in a circular orbit of radius $$36,000 \,km.$$ Then, the time period of a spy satellite orbiting a few hundred km above the earth's surface $$\left( {{R_{earth}} = 6400\,km} \right)$$ will approximately be-