Basic Op-Amp Circuits 1 Questions and Answers
Operational amplifiers (Op-Amps) are essential building blocks in analog electronics and are frequently included in competitive engineering exams. In this section, you will find Basic Op-Amp Circuits Questions with Answers focusing on inverting, non-inverting, summing amplifiers, comparator circuits, and differential amplifiers. These reasoning-focused technical questions are structured to support exam preparation for GATE, UGC NET, SSC JE, ISRO, DRDO, and ECE placement interviews. The topic uses exam-style multiple-choice questions and explanation-based answers to build clarity for students preparing for electronics aptitude tests and technical rounds. Practicing these questions helps learners understand amplifier gain calculation, input-output relationship, feedback mechanisms, and signal amplification principles—key topics requested by companies hiring electronics engineers.
Basic Op-Amp Circuits 1
1. A Schmitt trigger is
- a comparator with only one trigger point.
- a comparator with hysteresis.
- a comparator with three trigger points.
- none of the above.
2. The output of a Schmitt trigger is a
- pulse waveform.
- sawtooth waveform.
- sinusoidal waveform.
- triangle waveform.
3. A comparator with a Schmitt trigger has
- two trigger levels.
- a fast response.
- a slow response.
- one trigger level.
4. In a(n) ________, when the input voltage exceeds a specified reference voltage, the output changes state.
- integrator
- differentiator
- summing amplifier
- comparator
5. In a flash A/D converter, the priority encoder is used to
- select the first input.
- select the highest value input.
- select the lowest value input.
- select the last input.
6. What circuit produces an output that approximates the area under the curve of an input function?
- integrator
- differentiator
- summing amplifier
- comparator
7. A good example of hysteresis is a(n)
- AM radio.
- thermostat.
- alarm clock.
- none of the above
8. To reduce the effects of noise resulting in erratic switching of output states of a comparator, you can use
- the upper trigger point.
- the lower trigger point.
- nonzero-level detection.
- hysteresis.
9. What is (are) the necessary component(s) for the design of a bounded comparator?
- rectifier diodes
- zener diodes
- both of the above
10. What type(s) of circuit(s) use comparators?
- summer
- nonzero-level detector
- averaging amplifier
- summer and nonzero-level detector