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Amplifiers with Negative Feedback MCQs | Page - 1

Dear candidates you will find MCQ questions of Amplifiers with Negative Feedback here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

Q. 1) A feedback circuit usually employsnetwork

(A) Resistive
(B) Capacitive
(C) Inductive
(D) None of the above
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Q. 2) An emitter follower hasinput impedance

(A) Zero
(B) Low
(C) High
(D) None of the above
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Q. 3) Emitter follower is acircuit

(A) Voltage feedback
(B) Current feedback
(C) Both voltage and current feedback
(D) None of the above
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Q. 4) Emitter follower is used for _________.

(A) Current gain
(B) Impedance matching
(C) Voltage gain
(D) None of the above
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Q. 5) If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately_________.

(A) 500
(B) 100
(C) 1000
(D) 5000
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Q. 6) 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 _________.

(A) 10
(B) 0.1
(C) 15
(D) 20
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Q. 7) 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
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Q. 8) Negative feedback is employed in _______

(A) Oscillators
(B) Rectifiers
(C) Amplifiers
(D) None of the above
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Q. 9) The gain of an amplifier with feedback is known as gain

(A) Resonant
(B) Open loop
(C) Closed loop
(D) None of the above
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Q. 10) 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
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