Operational Amplifiers 3 Questions and Answers
Operational Amplifiers (Op-Amps) questions with answers are a vital part of electronics aptitude tests and interviews. Topics like inverting and non-inverting amplifiers, voltage followers, and comparator circuits often appear in exams like GATE, DRDO, and ISRO. Understanding parameters such as gain, input offset voltage, and slew rate helps candidates solve circuit-based problems efficiently. This collection of Op-Amp aptitude questions with detailed explanations allows learners to strengthen analytical and conceptual understanding, preparing them for both academic and professional evaluations. Practice these Op-Amp problems to boost your preparation for electronics-based aptitude and technical interviews.
Operational Amplifiers 3
Showing 10 of
45 questions
21. In which of the following operations is the resulting output signal of the differential amplifier near zero?
- Single-ended
- Double-ended
- Common-mode
- None of the above
23. Negative feedback added to an op-amp ________ the bandwidth and ________ the gain.
- increases, increases
- increases, decreases
- decreases, decreases
- decreases, increases
24. What is the scale multiplier (factor) of a basic integrator?
- R / C
- C / R
- –RC
- –1 / RC
25. Which of the following circuits is referred to as a BiMOS circuit?
- Bipolar and FET
- Bipolar and MOSFET
- Opposite-type MOSFETs
- None of the above
26. In the differential amplifier circuit, which of the following terminals are connected together?
- Bases
- Collectors
- One base to another collector
- Emitters
27. What is the cutoff frequency of an op-amp if the unity-gain frequency is 1.5 MHz and the open-loop gain is 100,000?
- 5 Hz
- 10 Hz
- 15 Hz
- 20 Hz
28. The ________ is the voltage gain of an op-amp with external feedback.
- Aol
- Acl
- Av
- [NIL]
29. A(n) ________ amplifier configuration has an input impedance approximately equal to the input resistor Ri and an output impedance approximately equal to the output impedance of the op-amp itself.
- non-inverting
- inverting
- voltage-follower
- [NIL]
30. What is the difference voltage if the inputs are an ideal in-phase signal?
- The differential gain times twice the input signal.
- The differential gain times the input signal.
- The common-mode gain times twice the input signal.
- The common-mode gain times the input signal.