41. Satellite operate in which of the following frequency rangers ?
(a) VHF
(b) MF
(c) VHF and UHF
(d) HF
42. …… is India’s first operational satellite.
(a) Aryabhatt
(b) SITE
(c) APPLE
(d) INSAT
43. First geostationary satellite in the world was launched in :
(a) 1952
(b) 1965
(c) 1975
(d) 1980
44. Which of the following noise becomes most important at high frequencies ?
(a) Transmit time noise
(b) Shot noise
(c) Thermal noise
(d) None of the above
45. Apple was powered by :
(a) Nackel-cadmium batteries
(b) Solar panels
(c) Both a and b
(d) None of these
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