Explore topic-wise MCQs in Electrical Engineering Questions.

This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

1.

Emitter follower is used for ________________?
A. Current gain
B. Impedance matching
C. Voltage gain
D. None of the above
Answer» C. Voltage gain
Discussion
2.

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
Answer» C. Remains the same
Discussion
3.

The value of negative feedback fraction is always _______________?
A. Less than 1
B. More than 1
C. Equal to 1
D. None of the above
Answer» B. More than 1
Discussion
4.

When current feedback (negative) is applied to an amplifier, its output impedance ________________?
A. Is increased
B. Is decreased
C. Remains the same
D. None of the above
Answer» B. Is decreased
Discussion
5.

The output impedance of an emitter follower is______________?
A. High
B. Very high
C. Almost zero
D. Low
Answer» E.
Discussion
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. 1
C. 01
D. 15
Answer» D. 15
Discussion
7.

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
Answer» C. Greater than 1
Discussion
8.

A feedback circuit usually employs _________________ network?
A. Resistive
B. Capacitive
C. Inductive
D. None of the above
Answer» B. Capacitive
Discussion
9.

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
Answer» E.
Discussion
10.

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
Answer» D. None of the above
Discussion
11.

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
Answer» B. Is decreased
Discussion
12.

When voltage 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
Answer» C. Remains the same
Discussion
13.

Emitter follower is a _______________circuit?
A. Voltage feedback
B. Current feedback
C. Both voltage and current feedback
D. None of the above
Answer» B. Current feedback
Discussion
14.

Emitter follower is used for________________?
A. Current gain
B. Impedance matching
C. Voltage gain
D. None of the above
Answer» C. Voltage gain
Discussion
15.

An emitter follower has ______________input impedance?
A. Zero
B. Low
C. High
D. None of the above
Answer» D. None of the above
Discussion
16.

The gain of an amplifier with feedback is known as____________gain?
A. Resonant
B. Open loop
C. Closed loop
D. None of the above
Answer» D. None of the above
Discussion
17.

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
Answer» C. 1000
Discussion
18.

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
Answer» B. Is increased
Discussion
19.

Negative feedback is employed in __________________?
A. Oscillators
B. Rectifiers
C. Amplifiers
D. None of the above
Answer» D. None of the above
Discussion