<h1 class=”banner-heading”>OP-AMP Circuits Mcqs</h1>
This set of Electrical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “OP-AMP Circuits ”. These questions are chosen from a collection of most authoritative and best reference books on Electrical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our Mcqs to assimilate OP-AMP Circuits comprehensively.

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1.
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_______________?

10 volts

5 volts

5/ volts

5/2 volts

Answer Discus (0)

2.
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______________?

50KHz

100KHz

1000/17KHz

1000/7.07KHz

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3.
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______________?

CMMR

Bandwidth

Slew rate

Open-loop gain

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4.
Assume that the op-amp of the fig. is ideal. If Vi is a triangular wave, then V0 will be______________?

Square wave

Triangular wave

Parabolic wave

Sine wave

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5.
A differential amplifier has a differential gain of 20,000. CMMR=80dB. The common mode gain is given by_______________?

2

1

1/2

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6.
Which of the following amplifier is used in a digital to analog converter?

Non inverter

Voltage follower

Summer

Difference amplifier

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7.
When a step-input is given to an op-amp integrator, the output will be______________?

A ramp

A sinusoidal wave

A rectangular wave

A triangular wave with dc bias

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8.
For an ideal op-amp, which of the following is true?

The differential voltage across the input terminals is zero

The current into the input terminals is zero

The current from output terminal is zero

The output resistance is zero

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9.
In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db & 2db respectively, then its common mode rejection ratio is________________?

23dB

25dB

46dB

50dB

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10.
Differential amplifiers are used in______________?

Instrumentation amplifiers

Voltage followers

Voltage regulators

Buffers

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11.
The two input terminals of an opamp are labeled as______________?

High and low

Positive and negative

Inverting and non inverting

Differential ans non differential

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12.
For an op-amp having differential gain Av and common-mode gain Ac the CMRR is given by___________?

Av + Ac

Av / Ac

1 + Av / AC.

Ac / Av

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13.
Hysteresis is desirable in Schmitt-trigger, because______________?

Energy is to be stored/discharged in parasitic capacitances

Effects of temperature would be compensated

Devices in the circuit should be allowed time for saturation and desaturation

It would prevent noise from causing false triggering

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