Amplifiers MCQ
Category –EE Online Test
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Attempt Free Amplifiers MCQ Here. Read The Important Electricity MCQ From Below.
Q1. When negative voltage feedback is applied to an amplifier, its voltage gain ……………….
Is increased
Is reduced
Remains the same
None of the above
Answer : 2
Q2. The value of negative feedback fraction is always …………….
Less than 1
More than 1
Equal to 1
None of the above
Answer : 1
Q3. 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 ………..
10
1
01
15
Answer : 3
Amplifiers MCQ
Q4. 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 …………..
5 db
300 db
103 db
97 db
Answer : 4
Q5. If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately………..
500
100
1000
5000
Answer : 2
Q6. A feedback circuit usually employs ……………… network
Resistive
Capacitive
Inductive
None of the above
Answer : 1
Q7. The gain of an amplifier with feedback is known as ………….. gain
Resonant
Open loop
Closed loop
None of the above
Answer : 3
Q8. When voltage feedback (negative) is applied to an amplifier, its input impedance ………….
Is decreased
Is increased
Remains the same
None of the above
Answer : 2
Amplifiers MCQ
Q9. When current feedback (negative) is applied to an amplifier, its input impedance …………..
Is decreased
Is increased
Remains the same
None of the above
Answer : 1
Q10. Negative feedback is employed in ……………..
Oscillators
Rectifiers
Amplifiers
None of the above
Answer : 3
Q11. Emitter follower is used for …………
Current gain
Impedance matching
Voltage gain
None of the above
Answer : 2
Q12. The voltage gain of an emitter follower is ………..
Much less than 1
Approximately equal to 1
Greater than 1
None of the above
Answer : 2
Amplifiers MCQ
Q13. When current feedback (negative) is applied to an amplifier, its output impedance ……..
Is increased
Is decreased
Remains the same
None of the above
Answer : 1
Q14. Emitter follower is a ……………….. circuit
Voltage feedback
Current feedback
Both voltage and current feedback
None of the above
Answer : 2
Q15. If voltage feedback (negative) is applied to an amplifier, its output impedance …………..
Remains the same
Is increased
Is decreased
None of the above
Answer : 3
Q16. When a negative voltage feedback is applied to an amplifier, its bandwidth……….
Is increased
Is decreased
Remains the same
Insufficient data
Answer : 1
Amplifiers MCQ
Q17. An emitter follower has ………… input impedance
Zero
Low
High
None of the above
Answer : 3
Q18. The output impedance of an emitter follower is ……….
High
Very high
Almost zero
Low
Answer : 4
Amplifiers MCQ
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