21. A passive satellite :
(a) only reflects back signals
(b) Only generates signals
(c) Only absorbs signals
(d) Receivers, modulates, and then reflects signals
22. For satellite communication the frequency should ….. the critical frequency of ionosphere.
(a) Equal to
(b) Less than
(c) More than
(d) None of the above
23. The carrier-to-noise ratio for a satellite depends upon :
(a) Bandwidth
(b) Free-space path losses
(c) Effective isotropically radiated power
(d) All of the above
24. Which of the following operations is to be carried out by INSAT ?
(a) Telecommunication
(b) Telecasting
(c) Metrology
(d) All of the above
25. The INSAT operates in :
(a) A band
(b) S band
(c) C band
(d) None of the above
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