41. For telegraphy the most commonly used modulation system is
42. The main function of a balanced modulator is to
43. In case of frequency modulation, modulating voltage remains constant if the modulating frequency is lowered, then
44. Full duplex operation permits transmission in both directions at the same time.
45. The colour of an object is decided by
46. Which of the following is a digital modulation technique?
47. Assertion (A): In FM the frequency of the carrier is varied by the modulating voltage
Reason (R): FM and PM are two forms of angle modulation.
Reason (R): FM and PM are two forms of angle modulation.
48. PAM stands for
49. Which of the following does not cause losses in optical fibre cables?
50. In a FM receiver, amplitude limiter
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