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Fundamentals of Electronics Engineering Unit 3 – Operational Amplifiers: important questions for AKTU

Unit 3 (Operational Amplifiers) questions that AKTU repeats most often. This unit carries about 26 marks per paper. Start with the repeated questions, then the most asked topics.

Most repeated Unit 3 questions

  • Enlist the characteristics of ideal OP-Amp. Also determine the output voltage of following circuit. (V1=7V via 100kΩ, V2=11V via 20kΩ, Rf=100kΩ, R_ground=20kΩ) (10 marks, 2022, Linear Op-Amp Circuits) – also asked in 2022, 2023, 2025, 2026
  • (i) Write the comparison between Inverting and Non-inverting Op-Amp. (ii) Describe the Differentiator and Integrator operation of amplifier and also formulate its overall output voltage. (7 marks, 2026, Integrator and Differentiator) – also asked in 2022, 2023, 2025
  • Explain the working of integrator and differentiator Op-Amp circuits. Include waveform examples and applications. (7 marks, 2025, Integrator and Differentiator) – also asked in 2022, 2023, 2026

Most important Unit 3 topic

  • Op-Amp Fundamentals (Unit 3: Operational Amplifiers) – asked 20 times in 2022, 2023, 2024, 2025, 2026

Most asked Unit 3 topics

  • Op-Amp Fundamentals – asked 20 times
  • Linear Op-Amp Circuits – asked 14 times
  • Integrator and Differentiator – asked 6 times

More Unit 3 previous year questions

  • Define CMRR, Slew Rate, and PSRR of Operational Amplifier. (2 marks, 2026, Op-Amp Fundamentals)
  • Describe the structure of an operational amplifier using a block diagram and explain each stage in detail? Draw the circuit diagram of differential amplifier using op-amp and find out the expression for output voltage. (7 marks, 2026, Op-Amp Fundamentals)
  • Determine the output voltage of the given following networks. (for figure-1 V1=0.2v and V2=0.5v) (for figure-2 V1=10v and V2=15v) (7 marks, 2026, Linear Op-Amp Circuits)
  • Why is a differential amplifier configuration preferred as the input stage of an op-amp? (2 marks, 2025, Op-Amp Fundamentals)
  • What do you mean by CMRR and Why is the Common-Mode Rejection Ratio (CMRR) critical in instrumentation applications using Op-Amps? (2 marks, 2025, Op-Amp Fundamentals)

Unit 3 syllabus topics

  • Op-Amp Fundamentals
  • Linear Op-Amp Circuits
  • Integrator and Differentiator