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Amplifiers with Negative Feedback

Amplifiers with Negative Feedback



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______________?
0

A. 5 db
B. 300 db
C. 103 db
D. 97 db

Emitter follower is used for ________________?
0

A. Current gain
B. Impedance matching
C. Voltage gain
D. None of the above

The voltage gain of an emitter follower is _____________?
0

A. Much less than 1
B. Approximately equal to 1
C. Greater than 1
D. None of the above

If voltage feedback (negative) is applied to an amplifier, its output impedance ______________?
0

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

An emitter follower has ______________input impedance?
0

A. Zero
B. Low
C. High
D. None of the above

Emitter follower is a _______________circuit?
0

A. Voltage feedback
B. Current feedback
C. Both voltage and current feedback
D. None of the above

When a negative voltage feedback is applied to an amplifier, its bandwidth_____________?
0

A. Is increased
B. Is decreased
C. Remains the same
D. Insufficient data

Emitter follower is used for________________?
0

A. Current gain
B. Impedance matching
C. Voltage gain
D. None of the above

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



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