Operational Amplifiers 2 Questions and Answers
Operational Amplifiers questions with answers are a key part of analog electronics and instrumentation reasoning preparation. These reasoning questions for competitive exams test your understanding of op-amp configurations, applications, and performance parameters. Practicing logical reasoning questions around inverting and non-inverting amplifiers, comparators, and filters builds a strong foundation for technical exams like GATE, ISRO, and PSU recruitment tests. By mastering op-amp concepts with reasoning-based questions, students can enhance analytical thinking and problem-solving efficiency in electronics.
Operational Amplifiers 2
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37 questions
11. A portion of the output that provides circuit stabilization is considered to be:
- negative feedback
- distortion
- open-loop
- positive feedback
12. How many leads does the TO-5 metal can package of an operational amplifier have?
- 8, 10, or 12
- 6, 8, or 10
- 8 or 14
- 8 or 16
13. If a noninverting amplifier has an RIN of 1000 ohms and an RFB of 2.5 kilohms, what is the RIN voltage when 1.42 mV is applied to the correct input?
- 3.5 mV
- ground
- 1.42 mV
- 0.56 mV
14. The closed-loop voltage gain of an inverting amplifier equals:
- the ratio of the input resistance to the feedback resistance
- the open-loop voltage gain
- the feedback resistance divided by the input resistance
- the input resistance
15. All of the following are basic op-amp input modes of operation EXCEPT
- inverting mode
- common-mode
- double-ended
- single-ended
16. A circuit whose output is proportional to the difference between the input signals is considered to be which type of amplifier?
- common-mode
- darlington
- differential
- operational
17. With negative feedback, the returning signal
- is proportional to the output current
- is proportional to the differential voltage gain
- opposes the input signal
- aids the input signal
18. The voltage follower has a:
- closed-loop voltage gain of unity
- small open-loop voltage gain
- closed-loop bandwidth of zero
- large closed-loop output impedance
19. The ratio between differential gain and common-mode gain is called:
- amplitude
- differential-mode rejection
- common-mode rejection
- phase
20. If the gain of a closed-loop inverting amplifier is 3.9, with an input resistor value of 1.6 kilohms, what value of feedback resistor is necessary?
- 6240 ohms
- 2.4 kilohms
- 410 ohms
- 0.62 kilohms