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Standard IX
Physics
The Solar System
Question

Satellites used for telecommunication relay are kept in geostationary orbit. A satellite is said to be in such an orbit when ___________.
(1) the orbit is geosynchronous
(2) the orbit is circular
(3) the orbit lies in the plane of the Earth's equator
(4) the orbit is at an altitude of 22236 km
Select the correct answer using the codes given below.
  1. 1, 3 and 4
  2. 2 and 4
  3. 1, 2 and 3
  4. All of the above

A
1, 3 and 4
B
All of the above
C
1, 2 and 3
D
2 and 4
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Solution
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A geostationary orbit is a circular geosynchronous orbit in which the satellite is placed at an altitude of approximately 35786 km above mean sea level. The orbit lies in the plane of the Earth's equator. An object in such an orbit has an orbital period equal to earth's rotational period and thus appears motionless.

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Satellites used for telecommunication relay are kept in geostationary orbit. A satellite is said to be in such an orbit when ___________.
(1) the orbit is geosynchronous
(2) the orbit is circular
(3) the orbit lies in the plane of the Earth's equator
(4) the orbit is at an altitude of 22236 km
Select the correct answer using the codes given below.
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