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Op-Amp (Operational Amplifier) MCQs
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Op-Amp (Operational Amplifier) MCQs
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25 Questions

1. The input offset current equals the ..........
2. The use of negative feedback .........
3. The common-mode voltage gain is .........
4. A certain inverting amplifier has a closed-loop voltage gain of 25. The Op-amp has an open-loop voltage gain of 100,000. If an Op-amp with an open-loop voltage gain of 200,000 is substituted in the arrangement, the closed-loop gain ........
5. In the common mode, ...............
6. A voltage follower ..........
7. Of the values listed, the most realistic value for open-loop voltage gain of an OP-amp is ......
8. The differential gain is .........
9. A certain OP-amp has bias currents of 50 μA. The input offset current is ........
10. A certain noninverting amplifier has Ri of 1 kΩ and Rf of 100 kΩ. The closed-loop voltage gain is .........
11. The Op-amp can amplify
12. The node voltage at the top of the til resistor is closes to ..........
13. In differential-mode, ................
14. If ADM = 3500 and ACM = 0.35, the CMRR is ..........
15. With zero volts on both inputs, an OP-amp ideally should have an output ...........
16. The output of a particular Op-amp increases 8V in 12μs. The slew rate is .......
17.  A common-mode signal is applied to ..........
18. The common-mode voltage gain of a differential amplifier is equal to RC divided by ........
19. For an Op-amp with negative feedback, the output is .......
20. If the feedback resistor in Q15 (above question) is open, the voltage gain .......
21. A differential amplifier .................
22. Current cannot flow to ground through .......
23. The input stage of an Op-amp is usually a ..........
24. The common-mode gain is ...........
25. The input impedance of a differential amplifier equals r’e times ......

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