Operational Amplifiers problems
- 1. A noninverting closed-loop op-amp circuit generally has a gain factor:
Options- A. less than one
- B. greater than one
- C. of zero
- D. equal to one Discuss
Correct Answer: greater than one
- 2. The Schmitt trigger is a two-state device that is used for:
Options- A. pulse shaping
- B. peak detection
- C. input noise rejection
- D. filtering Discuss
Correct Answer: pulse shaping
- 3. An ideal operational amplifier has
Options- A. infinite output impedance
- B. zero input impedance
- C. infinite bandwidth
- D. All of the above Discuss
Correct Answer: infinite bandwidth
- 4. With negative feedback, the returning signal:
Options- A. aids the input signal
- B. is proportional to output current
- C. opposes the input signal
- D. is proportional to differential voltage gain Discuss
Correct Answer: opposes the input signal
- 5. An ideal amplifier should have:
Options- A. high input current
- B. zero offset
- C. high output impedance
- D. moderate gain Discuss
Correct Answer: zero offset
- 6. A series dissipative regulator is an example of a:
Options- A. linear regulator
- B. switching regulator
- C. shunt regulator
- D. dc-to-dc converter Discuss
Correct Answer: linear regulator
- 7. All of the following are basic op-amp input modes of operation EXCEPT
Options- A. inverting mode
- B. common-mode
- C. double-ended
- D. single-ended Discuss
Correct Answer: inverting mode
- 8.
What value of input resistance is needed in the given circuit to produce the given output voltage?
Options- A. 50 Ω
- B. 4 kΩ
- C. 4.08 kΩ
- D. 5 kΩ Discuss
Correct Answer: 4 kΩ
- 9. How many logic states does an S-R flip-flop have?
Options- A. 2
- B. 3
- C. 4
- D. 5 Also asked in: AIEEE, Bank Exams, Bank Clerk
Correct Answer: 4
- 10. Op-amps used as high- and low-pass filter circuits employ which configuration?
Options- A. noninverting
- B. comparator
- C. open-loop
- D. inverting Discuss
Correct Answer: inverting
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