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Amplifiers with Negative Feedback

Amplifiers with Negative Feedback



The output impedance of an emitter follower is______________?
0

A. High
B. Very high
C. Almost zero
D. Low

When negative voltage feedback is applied to an amplifier, its voltage gain ____________?
0

A. Is increased
B. Is reduced
C. Remains the same
D. None of the above

The value of negative feedback fraction is always _______________?
0

A. Less than 1
B. More than 1
C. Equal to 1
D. None of the above

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_____________?
0

A. 10
B. 1
C. 01
D. 15

The gain of an amplifier with feedback is known as____________gain?
0

A. Resonant
B. Open loop
C. Closed loop
D. None of the above

If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately________________?
0

A. 500
B. 100
C. 1000
D. 5000

When current 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

A feedback circuit usually employs _________________ network?
0

A. Resistive
B. Capacitive
C. Inductive
D. None of the above

Negative feedback is employed in __________________?
0

A. Oscillators
B. Rectifiers
C. Amplifiers
D. None of the above

When current feedback (negative) is applied to an amplifier, its output impedance ________________?
0

A. Is increased
B. Is decreased
C. Remains the same
D. None of the above



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