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MCQs

Total Questions : 40 | Page 1 of 4 pages
Question 1. 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
 Discuss Question
Answer: Option B. -> Lower frequencies are easier to amplify
Question 2. Modulation is done in ___________
  1.    Transmitter
  2.    Radio receiver
  3.    Between transmitter and radio receiver
  4.    None of the above
 Discuss Question
Answer: Option A. -> Transmitter
Question 3. Demodulation is done in ___________
  1.    Receiving antenna
  2.    Transmitter
  3.    Radio receiver
  4.    Transmitting antenna
 Discuss Question
Answer: Option C. -> Radio receiver
Question 4. 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
 Discuss Question
Answer: Option C. -> Obtaining lower fixed intermediate frequency
Question 5. In the above question, what is the power in sidebands?
  1.    8 kW
  2.    6 kW
  3.    06 kW
  4.    9 kW
 Discuss Question
Answer: Option C. -> 06 kW
Question 6. At 100% modulation, the power in each sideband is ___________ of that of carrier
  1.    50%
  2.    40%
  3.    60%
  4.    25%
 Discuss Question
Answer: Option D. -> 25%
Question 7. In a transmitter ___________ oscillator is used
  1.    Hartley
  2.    RC phase-shift
  3.    Wien-bridge
  4.    Crystal
 Discuss Question
Answer: Option D. -> Crystal
Question 8. If level of modulation is increased ___________ power is increased
  1.    Carrier
  2.    Sideband
  3.    Carrier as well as sideband
  4.    None of the above
 Discuss Question
Answer: Option B. -> Sideband
Question 9. Overmodulation (amplitude) occurs when signal amplitude is ___________ carrier amplitude
  1.    Equal to
  2.    Greater than
  3.    Less than
  4.    None of the above
 Discuss Question
Answer: Option B. -> Greater than
Question 10. If modulation is 100% then signal amplitude is ___________ carrier amplitude
  1.    Equal to
  2.    Greater than
  3.    Less than
  4.    None of the above
 Discuss Question
Answer: Option A. -> Equal to

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