Analog Communication System MCQs

280 questionsElectronics-EngineeringPage 27 of 32

Practice free Analog Communication System multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 280 questions — no login required.

Question 235easy
An FM signal with modulation index mf is passed through a frequency tripler. The modulation index of the output signal will be
Question 236easy
A 1000 kHz carrier is simultaneously modulated with 300 Hz and 2 kHz audio sine waves. The frequency which will not be present in the output is
Question 237easy
A carrier is simultaneously modulated by two sine waves with modulation indicates of 0.3 and 0.4 If the modulated power is 10 kW, the total modulated power will be
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Question 238easy
A RF carrier of 12 kV at 1 MHz is amplitude modulated by a 1 kHz signal of 6 kV peak. The modulation pattern is observed on a CRO calibrated suitably. The voltage indicated will be
Question 239easy
An FM radio receiver is tuned to a 90.6 MHz broadcast station. It will receive an image frequency of
Question 240easy
The minimum value of m1 for an FM system required to produce a noticeable improvement in S/N ratio over comparable AM system with m =1 is
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Question 241easy
An FM signal with a deviation 8 is passed through a mixer and has its frequency reduced fivefold. The deviation in the output of the mixer is
Question 242easy
Two carriers 40 MHz and 80 MHz respectively are frequency modulated by a signal of frequency 4 kHz, such that the band-widths of the FM signal in the two cases are the same. The peak value deviation in the two cases are in the ratio of
Question 243easy
A superheterodyne receiver has an IF of 465 kHz. If it is tuned to a station broadcasting at 500 kHz and its oscillator is operating at 965 kHz, then the 1430 kHz frequency would be the
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