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MCQs

Total Questions : 37 | Page 1 of 4 pages
Question 1. Negative feedback is employed in ___________
  1.     Oscillators
  2.     Rectifiers
  3.     Amplifiers
  4.     None of the above
 Discuss Question
Answer: Option C. ->  Amplifiers
Question 2. A feedback circuit usually employs ___________ network
  1.     Resistive
  2.     Capacitive
  3.     Inductive
  4.     None of the above
 Discuss Question
Answer: Option A. ->  Resistive
Question 3. 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
Question 4. When a negative voltage feedback is applied to an amplifier, its bandwidth___________
  1.     Is increased
  2.     Is decreased
  3.     Remains the same
  4.     Insufficient data
 Discuss Question
Answer: Option A. ->  Is increased
Question 5. The output impedance of an emitter follower is ___________
  1.     High
  2.     Very high
  3.     Almost zero
  4.     Low
 Discuss Question
Answer: Option D. ->  Low
Question 6. 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
Question 7. 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
Question 8. 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
Question 9. The voltage gain of an emitter follower is ___________
  1.     Much less than 1
  2.     Approximately equal to 1
  3.     Greater than 1
  4.     None of the above
 Discuss Question
Answer: Option B. ->  Approximately equal to 1
Question 10. If voltage feedback (negative) is applied to an amplifier, its output impedance ___________
  1.     Remains the same
  2.     Is increased
  3.     Is decreased
  4.     None of the above
 Discuss Question
Answer: Option C. ->  Is decreased

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