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MCQs

Total Questions : 37 | Page 3 of 4 pages
Question 21. The value of negative feedback fraction is always _______________?
  1.    Less than 1
  2.    More than 1
  3.    Equal to 1
  4.    None of the above
 Discuss Question
Answer: Option A. -> Less than 1
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 22. The gain of an amplifier with feedback is known as____________gain?
  1.    Resonant
  2.    Open loop
  3.    Closed loop
  4.    None of the above
 Discuss Question
Answer: Option C. -> Closed loop
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 23. When negative voltage feedback is applied to an amplifier, its voltage gain ____________?
  1.    Is increased
  2.    Is reduced
  3.    Remains the same
  4.    None of the above
 Discuss Question
Answer: Option B. -> Is reduced
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 24. If the output of an amplifier is 10 V and 100 mV from the output is fed back to the input, then feedback fraction is_____________?
  1.    10
  2.    1
  3.    01
  4.    15
 Discuss Question
Answer: Option C. -> 01
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 25. When current feedback (negative) is applied to an amplifier, its input impedance _____________?
  1.    Is decreased
  2.    Is increased
  3.    Remains the same
  4.    None of the above
 Discuss Question
Answer: Option A. -> Is decreased
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 26. A feedback circuit usually employs _________________ network?
  1.    Resistive
  2.    Capacitive
  3.    Inductive
  4.    None of the above
 Discuss Question
Answer: Option A. -> Resistive
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 27. When current feedback (negative) is applied to an amplifier, its output impedance ________________?
  1.    Is increased
  2.    Is decreased
  3.    Remains the same
  4.    None of the above
 Discuss Question
Answer: Option A. -> Is increased
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 28. Negative feedback is employed in __________________?
  1.    Oscillators
  2.    Rectifiers
  3.    Amplifiers
  4.    None of the above
 Discuss Question
Answer: Option C. -> Amplifiers
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 29. Emitter follower is used for ________________?
  1.    Current gain
  2.    Impedance matching
  3.    Voltage gain
  4.    None of the above
 Discuss Question
Answer: Option B. -> Impedance matching
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 30. The gain of an amplifier without feedback is 100 db. If a negative feedback of 3 db is applied, the gain of the amplifier will become______________?
  1.    5 db
  2.    300 db
  3.    103 db
  4.    97 db
 Discuss Question
Answer: Option D. -> 97 db
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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