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
11. An IC unit made using both ________ and ________ transistors is called a ________ circuit.
- bipolar, MOSFET, BiFET
- bipolar, MOSFET, BiMOS
- TTL, MOSFET, TailFET
12. What is the slew rate of an op-amp if the output voltages change from 2 V to 3 V in 0.2 ms?
- 5 V/ms
- 3 V/ms
- 2 V/ms
- 1 V/ms
13. The maximum rate of change of the output voltage in response to a step input voltage is the ________ of an op-amp.
- time constant
- maximum frequency
- slew rate
- static discharge
14. At what input voltage level does the output voltage level become numerically equal to the value of the differential gain of the amplifier?
- Vi1 = –Vi2 = 0.25 V
- V i1 = –V i2 = 0.50 V
- V i1 = –V i2 = 0.75 V
- V i1 = –Vi2 = 1.00 V
15. A practical op-amp has very ________ input impedance, very ________ output impedance, very ________ open-loop voltage gain, and a ________ bandwidth.
- high, low, high, wide
- high, high, low, narrow
- low, high, high, wide
- low, low, low, wide
16. What is the level of the roll-off in most op-amps?
- –6 dB / decade
- –20 dB / octave
- –6 dB / decade or –20 dB / octave
- –20 dB / decade or –6 dB / octave
17. The input offset voltage drift is a parameter directly related to VOS and ________.
- ID
- power dissipation
- temperature
- phase shift
18. What is the difference voltage if the inputs are an ideal opposite 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.
19. Which of the following circuit conditions affect(s) the output offset voltage of an op-amp?
- An input offset voltage, VIO
- An input offset current, IIO
- Both an input offset voltage, VIO and an input offset current, IIO
- None of the above
20. A(n) ________ amplifier configuration has a higher input impedance and a lower output impedance than the op-amp itself.
- non-inverting
- inverting
- voltage-follower
- [NIL]