Q. In TV, video signals are transmitted through ?
✅ Correct Answer: (C)
Amplitude modulation
Communication Engineering MCQs | Page - 50
Dear candidates you will find MCQ questions of Communication Engineering here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. A carrier voltage is simultaneously modulated by two sine waves causing modulation indices of 0.4 and 0.3. the overall modulation index is ?
✅ Correct Answer: (C)
0.5
Q. Which one of the following is used for the detection of AM-DSB-SC signal ?
✅ Correct Answer: (C)
Product demodulator
Q. Absorption of Ratio waves in atmosphere depends on ?
✅ Correct Answer: (A)
Frequency of waves
Q. A 20kW carrier is sinusoid ally modulated by two carriers corresponding to a modulation index of 20% and 40 % respectively. The total radiated power is ?
✅ Correct Answer: (D)
22kW
Q. For which of the following reasons, amplitude modulation is used for broadcasting ?
✅ Correct Answer: (B)
It use avoids receiver complexity
Q. The input to a coherent detector is DSB-SC signal plus noise. The noise at the detector output is ?
✅ Correct Answer: (C)
Zero
Q. In amplitude modulation AM, if modulation index is more than 100% then ?
✅ Correct Answer: (C)
The wave gets distorted
Q. Number of ‘side bands’ produced during A.M ?
✅ Correct Answer: (B)
Two
Q. In frequency modulation: ?
✅ Correct Answer: (C)
Carrier signal frequency varies with the frequency of modulating signal
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