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MCQs

Total Questions : 18 | Page 1 of 2 pages
Question 1. Emitter follower is a ___________ circuit
  1.    Voltage feedback
  2.    Current feedback
  3.    Both voltage and current feedback
  4.    None of the above
 Discuss Question
Answer: Option A. -> Voltage feedback
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. An emitter follower has ___________ input impedance
  1.    Zero
  2.    Low
  3.    High
  4.    None of the above
 Discuss Question
Answer: Option C. -> High
Question 4. 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 5. 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 6. 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 7. 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.    1
  4.    15
 Discuss Question
Answer: Option C. -> 1
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. The output impedance of an emitter follower is ___________
  1.    High
  2.    Very high
  3.    Almost zero
  4.    Low
 Discuss Question
Answer: Option D. -> Low

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