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Electrical Engineering - Opamp Circuits MCQs
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Electrical Engineering - Opamp Circuits MCQs
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25 Questions

1. The ideal OP-AMP has the following characteristics
2. The output voltage Vo of the above circuit is
3. .Calculate the cutoff frequency of a first-order low-pass filter for R1 =2.5kΩ and C1 = 0.05μF
4. Hysteresis is desirable in Schmitt-trigger, because
5. An ideal OP-AMP is an ideal
6. A differential amplifier is invariably used in the i/p stage of all op-amps. This is done basically to provide the op-amps with a very high
7. A differential amplifier has a differential gain of 20,000. CMMR=80dB.The common mode gain is given by
8. A non inverting closed loop op amp circuit generally has a gain factor
9. The approximate input impedance of the opamp circuit which has Ri=10k,Rf=100k, RL=10k
10. The two input terminals of an opamp are labeled as
11. The closed-loop voltage gain of an inverting amplifier equal to
12. Op-amp circuits may be cascaded without changing their input output relationships
13. Differential amplifiers are used in
14. Which of the following amplifier is used in a digital to analog converter?
15. An ideal OP-AMP is an ideal
16. For an ideal op-amp, which of the following is true?
17. When a step-input is given to an op-amp integrator, the output will be
18. An opamp has a slew rate of 5V/ S. the largest sine wave o/p voltage possible at a frequency of 1MHz is
19. The ideal OP-AMP has the following characteristics.
20. A 741-Type OP-AMP has a gain-bandwith product of 1MHz. A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit-3db bandwidth of
21. An amplifier using an opamp with slew rate SR=1v/sec has a gain of40db.If this amplifier has to faithfully amplify sinusoidal signals from dc to20KHz without introducing any slew-rate induced distortion, then the input signal level exceed
22. An OPAMP has a slew rate of 5 V/μ S .The largest sine wave O/P voltage possible at a frequency of 1 MHZ is
23. For an op-amp having differential gain Av and common-mode gain Ac theCMRR is given by
24. How many op-amps are required to implement this equation Vo= – (RfV1/R1+RfV2/R2+RfV3/R3)
25. If ground is applied to the (+) terminal of an inverting op-amp, the (–) terminal will

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