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amplifiers with negative feedback MCQs

Practise focused amplifiers with negative feedback questions with marked answers for exam preparation and subject revision.

amplifiers with negative feedback Mcqs
1. The voltage gain of an emitter follower is _____________?
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A. Approximately equal to 1

B. Greater than 1

C. None of the above

D. Much less than 1

2. The gain of an amplifier with feedback is known as____________gain?
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A. Open loop

B. None of the above

C. Closed loop

D. Resonant

3. If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately________________?
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A. 5000

B. 1000

C. 100

D. 500

4. Negative feedback is employed in __________________?
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A. Rectifiers

B. None of the above

C. Oscillators

D. Amplifiers
5. The output impedance of an emitter follower is______________?
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A. Almost zero

B. Very high

C. Low

D. High

6. When current feedback (negative) is applied to an amplifier, its output impedance ________________?
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A. Remains the same

B. None of the above

C. Is increased

D. Is decreased

7. When negative voltage feedback is applied to an amplifier, its voltage gain ____________?
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A. Is increased

B. Is reduced

C. Remains the same

D. None of the above

8. A feedback circuit usually employs _________________ network?
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A. None of the above

B. Capacitive

C. Resistive

D. Inductive

9. When voltage feedback (negative) is applied to an amplifier, its input impedance _______________?
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A. Is decreased

B. Is increased

C. Remains the same

D. None of the above

10. When a negative voltage feedback is applied to an amplifier, its bandwidth_____________?
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A. Is increased

B. Insufficient data

C. Is decreased

D. Remains the same

11. 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_____________?
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A. 10

B. 1

C. 01

D. 15

12. The value of negative feedback fraction is always _______________?
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A. More than 1

B. None of the above

C. Less than 1

D. Equal to 1

13. Emitter follower is a _______________circuit?
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A. Voltage feedback

B. Current feedback

C. Both voltage and current feedback

D. None of the above

14. If voltage feedback (negative) is applied to an amplifier, its output impedance ______________?
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A. Is decreased

B. Remains the same

C. Is increased

D. None of the above

15. When current feedback (negative) is applied to an amplifier, its input impedance _____________?
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A. None of the above

B. Is decreased

C. Is increased

D. Remains the same

16. 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______________?
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A. 103 db

B. 300 db

C. 5 db

D. 97 db</strong>

17. Emitter follower is used for ________________?
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A. None of the above

B. Voltage gain

C. Impedance matching

D. Current gain

18. An emitter follower has ______________input impedance?
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A. None of the above

B. High

C. Zero

D. Low

19. Emitter follower is used for________________?
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A. Current gain

B. Voltage gain

C. Impedance matching

D. None of the above