16. A geostationary satellite is not quite geostationary but executes a …. Figure of eight daily.
(a) 10 km
(b) 20 km
(c) 30 km
(d) 40 km
17. Communication satellite are invariably :
(a) Changing their track and speed
(b) Revolving at their own speed
(c) Geostationary
(d) Stationary
18. Sputnik I was orbiting the earth in :
(a) 24 days
(b) 24 hours
(c) 5 hours
(d) 90 minutes
19. Moon completes one orbit in :
(a) 24 hours
(b) 3 days
(c) 24 days
(d) 28 days
20. For a satellite with time period of 2 hours, the height above the surface must be :
(a) 500 km
(b) 1000 km
(c) 2000 km
(d) 3000 km
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