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
11. A differentiator is used to measure
- the sum of the input voltages.
- the difference between two voltages.
- the area under a curve.
- the rate of change of the input voltage.
12. A(n) ________ amplifier is a summing amplifier with a closed-loop gain equal to the reciprocal of the number of inputs.
- averaging
- scaling
- none of the above
13. ________ is a mathematical process for determining the rate of change of a function.
- Integration
- Differentiation
- Summing
- Comparatoring
14. An integrator circuit
- uses a resistor in its feedback circuit.
- uses an inductor in its feedback circuit.
- uses a capacitor in its feedback circuit.
- uses a resistor in its feedback circuit or uses a capacitor in its feedback circuit
15. In a comparator with output bounding, what type of diode is used in the feedback loop?
- Schottky
- junction
- zener
- varactor Answer & Explanation
16. A comparator with hysteresis is sometimes known as a(n)
- integrator.
- differentiator.
- Schmitt trigger.
- none of the above
17. Which of the following are variations of the basic summing amplifier?
- averaging amplifier
- scaling amplifier
- both of the above
19. An op-amp can be used as a comparator to determine when an input voltage exceeds a certain level.
- TRUE
- FALSE
20. The output voltage of a summing amplifier is proportional to the sum of the input voltages.
- TRUE
- FALSE