Amplifiers with Negative Feedback

11. The output impedance of an emitter follower is _________.

  1. High
  2. Very high
  3. Almost zero
  4. Low

Correct answer: (D)
Low

12. 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

Correct answer: (A)
Less than 1

13. 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

Correct answer: (B)
Approximately equal to 1

14. Then 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

Correct answer: (A)
Is decreased

15. 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

Correct answer: (A)
Is increased

16. 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

Correct answer: (A)
Is increased

17. 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

Correct answer: (B)
Is reduced

18. When voltage 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

Correct answer: (B)
Is increased

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