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.Management Sciences
Category: Amplifiers with Negative Feedback
When voltage feedback (negative) is applied to an amplifier, its input impedance _______________?
0
A. Is decreased
B. Is increased
C. Remains the same
D. None of the above
Negative feedback is employed in __________________?
A. Oscillators
B. Rectifiers
C. Amplifiers
D. None of the above
When current feedback (negative) is applied to an amplifier, its input impedance _____________?
A. Is decreased
B. Is increased
C. Remains the same
D. None of the above
A feedback circuit usually employs _________________ network?
A. Resistive
B. Capacitive
C. Inductive
D. None of the above
The gain of an amplifier with feedback is known as____________gain?
A. Resonant
B. Open loop
C. Closed loop
D. None of the above
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
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
The output impedance of an emitter follower is______________?
A. High
B. Very high
C. Almost zero
D. Low
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