Modulation and Demodulation MCQs

Q. In a superhetrodyne receiver, the difference frequency is chosen as the IF rather than the sum frequency because ___________

  1. The difference frequency is closer to oscillator frequency
  2. Lower frequencies are easier to amplify
  3. Only the difference frequency can be modulated
  4. None of the above
Answer
(b)

Q. Modulation is done in ___________

  1. Transmitter
  2. Radio receiver
  3. Between transmitter and radio receiver
  4. None of the above
Answer
(a)

Q. Demodulation is done in ___________

  1. Receiving antenna
  2. Transmitter
  3. Radio receiver
  4. Transmitting antenna
Answer
(c)

Q. In a transmitter ___________ oscillator is used

  1. Hartley
  2. RC phase-shift
  3. Wien-bridge
  4. Crystal
Answer
(d)

Q. Superhertodyne principle refers to

  1. Using a large number of amplifier stages
  2. Using a push-pull circuit
  3. Obtaining lower fixed intermediate frequency
  4. None of the above
Answer
(c)
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