Amplifiers With Negative Feedback Mcqs
Q.1: When voltage feedback (negative) is applied to an amplifier, its input impedance _______________?a
A. Is decreased
B. Is increased
C. Remains the same
D. None of the above
Q.2: Emitter follower is used for________________?-
A. Current gain
B. Impedance matching
C. Voltage gain
D. None of the above
Q.3: When a negative voltage feedback is applied to an amplifier, its bandwidth_____________?X
A. Is increased
B. Is decreased
C. Remains the same
D. Insufficient data
Q.4: Emitter follower is a _______________circuit?-
A. Voltage feedback
B. Current feedback
C. Both voltage and current feedback!
D. None of the above
Q.5: An emitter follower has ______________input impedance?6
A. Zero
B. Low
C. High
D. None of the above
Q.6: If voltage feedback (negative) is applied to an amplifier, its output impedance ______________?_
A. Remains the same
B. Is increased
C. Is decreased
D. None of the above
Q.7: The voltage gain of an emitter follower is _____________?9
A. Much less than 1
B. Approximately equal to 1
C. Greater than 1
D. None of the above
Q.8: Emitter follower is used for ________________?.
A. Current gain
B. Impedance matching
C. Voltage gain
D. None of the above
Q.9: 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______________?
A. 5 db
B. 300 db
C. 103 db
D. 97 db
Q.10: When current feedback (negative) is applied to an amplifier, its output impedance ________________?c
A. Is increased
B. Is decreased
C. Remains the same
D. None of the above

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