Electronic Devices and Circuit Theory-Communications Questions and Answers

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Showing 10 of 17 questions
Q11
The mixer takes the RF signal along with the audio signal to produce the IF signal.
  • A TRUE
  • B FALSE
Answer: Option B
Q12
A balanced modulator is used in standard AM to obtain the sum and difference frequencies.
  • A TRUE
  • B FALSE
Answer: Option B
Q13
The demodulator recovers the audio signal from the IF output.
  • A TRUE
  • B FALSE
Answer: Option A
Q14
Selectivity in a receiver is provided by the resonant circuits of the IF section.
  • A TRUE
  • B FALSE
Answer: Option A
Q15
An AM signal is made up of a carrier, an upper-side frequency, and a lower-side frequency.
  • A TRUE
  • B FALSE
Answer: Option A
Q16
Frequency modulation is achieved by varying the frequency of an oscillator with a modulating signal.
  • A TRUE
  • B FALSE
Answer: Option A
Q17
Amplitude modulation is the process of varying the radio frequency with the modulating frequency.
  • A TRUE
  • B FALSE
Answer: Option B

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