Q. In frequency modulation ?
✅ Correct Answer: (D)
Carrier signal frequency varies with the frequency of modulating signal
Communication Engineering MCQs | Page - 51
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. As the modulation index of an FM signal with sinusoidal modulation is increased from zero to two, the power in the carrier component will ?
✅ Correct Answer: (A)
Decrease continuously
Q. VSB modulation is preferred in TV because ?
✅ Correct Answer: (A)
If reduces the bandwidth requirement to half
Q. Which of the following statement is correct ?
✅ Correct Answer: (D)
Bandwidth of FM signal is larger than AM signal
Q. Which of the following modulation scheme is most band width efficient ?
✅ Correct Answer: (D)
SSB-SC
Q. With increase in modulation index: ?
✅ Correct Answer: (C)
Transmitted power remain constant in FM but increases in AM
Q. A balanced modulator is used for generation of which of the following ?
✅ Correct Answer: (A)
DSB-SC signal
Q. Modulation is primarily accomplished to ?
✅ Correct Answer: (D)
Transmit audio-frequency signal over long distance
Q. If modulation index is 0.8 then what will be the transmission power efficiency for a tone modulated signal ?
✅ Correct Answer: (A)
24.24%
Q. Percentage modulation of an AM wave having a power content of 8 KW at carrier frequency and 2 KW in each of its side bands is: ?
✅ Correct Answer: (C)
100%
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