Amplifiers With Negative Feedback MCQ Questions & Answers

1

Emitter follower is a ___________ circuit

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

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Answer & Solution

Answer: Option A

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2

A feedback circuit usually employs ___________ network

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

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Answer & Solution

Answer: Option A

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3

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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Answer & Solution

Answer: Option C

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4

An emitter follower has ___________ input impedance

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

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Answer & Solution

Answer: Option C

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5

When negative voltage feedback is applied to an amplifier, its voltage gain ___________

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

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Answer & Solution

Answer: Option B

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6

When a negative voltage feedback is applied to an amplifier, its bandwidth___________

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

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Answer & Solution

Answer: Option A

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7

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) 11 C) 1 D) 15

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Answer & Solution

Answer: Option C

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8

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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Answer & Solution

Answer: Option D

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9

The voltage gain of an emitter follower is ___________

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

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Answer & Solution

Answer: Option B

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10

The output impedance of an emitter follower is ___________

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

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Answer & Solution

Answer: Option D

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Amplifiers With Negative Feedback MCQ Questions & Answers | Electrical Engineering