Question:
In amplitude modulation:
(A) The envelope detector operates properly, only if $(1/f_c) \leq RC \leq (1/f_m)$
(B) Vestigial sideband modulation is used in television broadcasting.
(C) Selective fading produces more distortion in SSB-SC systems than in DSB-SC.
(D) Efficiency of a suppressed carrier system is 100%, whereas in AM the maximum efficiency is only 33.3%.
Choose the correct answer from the options given below:
In amplitude modulation:
(A) The envelope detector operates properly, only if $(1/f_c) \leq RC \leq (1/f_m)$
(B) Vestigial sideband modulation is used in television broadcasting.
(C) Selective fading produces more distortion in SSB-SC systems than in DSB-SC.
(D) Efficiency of a suppressed carrier system is 100%, whereas in AM the maximum efficiency is only 33.3%.
Choose the correct answer from the options given below:
(A) The envelope detector operates properly, only if $(1/f_c) \leq RC \leq (1/f_m)$
(B) Vestigial sideband modulation is used in television broadcasting.
(C) Selective fading produces more distortion in SSB-SC systems than in DSB-SC.
(D) Efficiency of a suppressed carrier system is 100%, whereas in AM the maximum efficiency is only 33.3%.
Choose the correct answer from the options given below:
Show Hint
For AM systems, remember efficiency limits and where each modulation scheme is practically used.
Updated On: Sep 19, 2025
- (A), (B) and (D) only
- (B) and (C) only
- (A), (C) and (D) only
- (B), (C) and (D) only
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Recall properties of AM.
- Envelope detector condition is approximate.
- VSB is indeed used in TV broadcasting.
- Selective fading affects SSB-SC more.
- AM has limited efficiency (max 33.3%).
Step 2: Select valid statements.
(B), (C), (D) are correct.
Final Answer: \[ \boxed{(4)} \]
- Envelope detector condition is approximate.
- VSB is indeed used in TV broadcasting.
- Selective fading affects SSB-SC more.
- AM has limited efficiency (max 33.3%).
Step 2: Select valid statements.
(B), (C), (D) are correct.
Final Answer: \[ \boxed{(4)} \]
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