Operational Amplifiers 1 Questions and Answers
Operational Amplifiers reasoning questions with answers cover critical topics such as op-amp characteristics, applications, and frequency response. These logical reasoning questions are designed to test analytical and conceptual clarity in electronics circuits. Practicing reasoning questions for competitive exams like GATE, ISRO, and BARC builds a deep understanding of amplifier operation and troubleshooting. Strengthen your preparation with detailed solutions and explanations that help simplify complex op-amp principles for exam success.
Operational Amplifiers 1
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36 questions
31. An output that is proportional to the addition of two or more inputs is from which type of amplifier?
- differentiator
- difference
- summing
- analog subtractor
32. In a PLL, to obtain lock, the signal frequency must:
- come within the lock range
- be less than the capture frequency
- come within the capture range
- be greater than the capture frequency
33. A differential amplifier has a common-mode gain of 0.2 and a common-mode rejection ratio of 3250. What would the output voltage be if the single-ended input voltage was 7 mV rms?
- 1.4 mV rms
- 650 mV rms
- 4.55 V rms
- 0.455 V rms
34. The magnitude of closed-loop voltage gain (Acl) of an inverting amplifier equals:
- the ratio of the input resistance to the feedback resistance
- the open-loop voltage gain Aol
- the feedback resistance divided by the input resistance
- the input resistance
35. What is the difference between common-mode and differential-mode input signals?
- phase relationship
- voltage
- current
- apparent power
36. A circuit that uses an amplifier with passive filter elements is called a(n):
- relaxation oscillator
- signal generator
- differential amplifier
- active filter