(1)
Digital signals:
Answer: (b) and (c) both
Answer: (b) and (c) both
Answer: represents values as discrete steps
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Answer: decrease in noise of AM receiver
Answer: All of the above
Answer: digital data communication
(Radius of earth = 6.4 X 106 m)
Answer: 4.5 × 104 m
Answer: Both (a) and (b)
Answer: remains constant
Answer: low frequency message signal on high frequency waves
Answer: 40 km
Answer: All of them
Answer: Ultra high frequency band
Answer: B, C, D
Answer: B, D
Answer: A, B, D
Answer: ωc
Answer: 1.003 MHz and 0.997 MHz
Answer: 100 W
Answer: ~ 400 m
Answer: its use avoids receiver complexity
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