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MCQs

Total Questions : 37 | Page 1 of 4 pages
Question 1. The gain of an amplifier is expressed in db because ___________
  1.    It is a simple unit
  2.    Calculations become easy
  3.    Human ear response is logarithmic
  4.    None of the above
 Discuss Question
Answer: Option C. -> Human ear response is logarithmic
Question 2. RC coupling is not used to amplify extremely low frequencies because
  1.    There is considerable power loss
  2.    There is hum in the output
  3.    Electrical size of coupling capacitor becomes very large
  4.    None of the above
 Discuss Question
Answer: Option C. -> Electrical size of coupling capacitor becomes very large
Question 3. A current amplification of 2000 is a gain of ___________
  1.    3 db
  2.    66 db
  3.    20 db
  4.    200 db
 Discuss Question
Answer: Option B. -> 66 db
Question 4. If the power level of an amplifier reduces to half, the db gain will fall by .
  1.    5 db
  2.    2 db
  3.    10 db
  4.    3 db
 Discuss Question
Answer: Option D. -> 3 db
Question 5. The number of stages that can be directly coupled is limited because
  1.    Changes in temperature cause thermal instability
  2.    Circuit becomes heavy and costly
  3.    It becomes difficult to bias the circuit
  4.    None of the above
 Discuss Question
Answer: Option A. -> Changes in temperature cause thermal instability
Question 6. In the initial stages of a multistage amplifier, we use ___________
  1.    RC coupling
  2.    Transformer coupling
  3.    Direct coupling
  4.    None of the above
 Discuss Question
Answer: Option A. -> RC coupling
Question 7. A radio receiver has ___________ of amplification
  1.    One stage
  2.    Two stages
  3.    Three stages
  4.    More than one stages
 Discuss Question
Answer: Option D. -> More than one stages
Question 8. RC coupling is used for ___________ amplification
  1.    Voltage
  2.    Current
  3.    Power
  4.    None of the above
 Discuss Question
Answer: Option A. -> Voltage
Question 9. Transformer coupling is used for ___________ amplification
  1.    Power
  2.    Voltage
  3.    Current
  4.    None of the above
 Discuss Question
Answer: Option A. -> Power
Question 10. The lower and upper cut off frequencies are also called ___________ frequencies
  1.    Sideband
  2.    Resonant
  3.    Half-resonant
  4.    Half-power
 Discuss Question
Answer: Option D. -> Half-power

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