OP Amp MCQ Questions & Answers | Electrical Engineering

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21.
An opamp has a slew rate of 5V/ S. the largest sine wave o/p voltage possible at a frequency of 1MHz is

A. 10 V

B. 5 V

C. 5 V

D. 5/2 V

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22.
The closed-loop voltage gain of an inverting amplifier equal to

A. The ratio of the input resistance to feedback resistance

B. The open-loop voltage gain

C. The feedback resistance divided by the input resistance

D. The input resistance

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23.
Of the values listed, the most realistic value for open-loop voltage gain of an OP-amp is

A. 1

B. 2000

C. 80 dB

D. 100000

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24.
If ground is applied to the (+) terminal of an inverting OP-amp, the (–) terminal will

A. Not need an input resistor

B. Be virtual ground

C. Have high reverse current

D. Not invert the signal

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25.
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

A. doubles

B. drops to 12.5

C. remains at 25

D. increases slightly

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