Operational Amplifiers - General Questions (4)

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Operational Amplifiers - General Questions

25. 

The voltage follower has a:
A. closed-loop voltage gain of unity
B. small open-loop voltage gain
C. closed-loop bandwidth of zero
D. large closed-loop output impedance

Answer: Option A

Explanation:

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26. 

What is the output waveform?

mcq15_1015_1 (1)
A. sine wave
B. square wave
C. +15 V
D. –15 V

Answer: Option A

Explanation:

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27. 

With negative feedback, the returning signal
A. is proportional to the output current
B. is proportional to the differential voltage gain
C. opposes the input signal
D. aids the input signal

Answer: Option C

Explanation:

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28. 

A circuit whose output is proportional to the difference between the input signals is considered to be which type of amplifier?
A. common-mode
B. darlington
C. differential
D. operational

Answer: Option C

Explanation:

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29. 

What is the output voltage?

mcq15_1014_1 (1)
A. 15 V
B. 5 V
C. –5 V
D. –15 V

Answer: Option C

Explanation:

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30. 

All of the following are basic op-amp input modes of operation EXCEPT
A. inverting mode
B. common-mode
C. double-ended
D. single-ended

Answer: Option A

Explanation:

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31. 

What is the cutoff frequency of this low-pass filter?

mcq15_1018_1
A. 4.8 kHz
B. 3.8 kHz
C. 2.8 kHz
D. 1.8 kHz

Answer: Option D

Explanation:

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32. 

The closed-loop voltage gain of an inverting amplifier equals:
A. the ratio of the input resistance to the feedback resistance
B. the open-loop voltage gain
C. the feedback resistance divided by the input resistance
D. the input resistance

Answer: Option C

Explanation:

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