# OP-AMP Circuits Mcqs – (Electrical Engineering) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests

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#### OP-AMP Circuits Mcqs – (Electrical Engineering) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests

OP-AMP Mcqs “. Tab this page to check “Latest OP-AMP MCQs” for the preparation of competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs and others. The most occurred mcqs of OP-AMP in past papers. Past papers of OP-AMP mcqs. Past papers of OP-AMP MCQs. Mcqs are the necessary part of any competitive / job related exams. The OP-AMP mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related OP-AMP mcqs. The Important series of OP-AMP Mcqs are given below:

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_______________?

A. 5 volts
B. 10 volts
C. 5/ volts
D. 5/2 volts

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______________?

A. 50KHz
B. 1000/17KHz
C. 100KHz
D. 1000/7.07KHz

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______________?

A. Bandwidth
B. CMMR
C. Slew rate
D. Open-loop gain

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

A. Triangular wave
B. Square wave
C. Parabolic wave
D. Sine wave

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

A. 2
B. 1/2
C. 1
D. 0

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

A. Voltage follower
B. Non inverter
C. Summer
D. Difference amplifier

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

A. A ramp
B. A rectangular wave
C. A sinusoidal wave
D. A triangular wave with dc bias

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

A. The differential voltage across the input terminals is zero
B. The output resistance is zero
C. The current from output terminal is zero
D. The current into the input terminals is zero

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________________?

A. 23dB
B. 46dB
C. 25dB
D. 50dB

Differential amplifiers are used in______________?

A. Instrumentation amplifiers
B. Voltage regulators
C. Voltage followers
D. Buffers

The two input terminals of an opamp are labeled as______________?

A. Positive and negative
B. High and low
C. Inverting and non inverting
D. Differential ans non differential

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

A. 1 + Av / AC.
B. Av / Ac
C. Av + Ac
D. Ac / Av

Hysteresis is desirable in Schmitt-trigger, because______________?

A. Energy is to be stored/discharged in parasitic capacitances
B. It would prevent noise from causing false triggering
C. Devices in the circuit should be allowed time for saturation and desaturation
D. Effects of temperature would be compensated

The output voltage Vo of the above circuit is____________?

A. -1.2V
B. -5V
C. -6V
D. -0.2V

In the above circuit the current ix is___________?

A. 0.2A
B. 0.5A
C. 0.6A
D. 1/12A

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. 5V
C. 5 V
D. 5/2 V

The approximate input impedance of the opamp circuit which has Ri=10k, Rf=100k, RL=10k?

A. 120k
B. ∞
C. 110k
D. 10k

An amplifier using an opamp with slew rate SR=1v/sec has a gain of 40db.If this amplifier has to faithfully amplify sinusoidal signals from dc to 20KHz without introducing any slew-rate induced distortion, then the input signal level exceed_____________?

A. 395mV
B. 795mV
C. 795mV
D. 39.5mV

An ideal OP-AMP is an ideal__________?

A. Current controlled Voltage source
B. Current controlled Current source
C. Voltage controlled Voltage source
D. Voltage controlled Current source

How many op-amps are required to implement this equation Vo = V1?

A. 3
B. 4
C. 2
D. 1

How many op-amps are required to implement this equationop-amps?

A. 3
B. 2
C. 4
D. 1

The ideal OP-AMP has the following characteristics

A. Ri=∞ ,A=∞ ,R0=0
B. Ri=∞ ,A=∞ ,R0=∞
C. Ri=0 ,A=∞ ,R0=0
D. Ri=0 ,A=∞ ,R0=∞

If ground is applied to the (+) terminal of an inverting op-amp, the (–) terminal will_____________?

A. Have high reverse current
B. Be virtual ground
C. Not need an input resistor
D. Not invert the signal

An ideal OP-AMP is an ideal______________?

A. Current controlled voltage source
B. Current controlled Current source
C. Voltage controlled voltage source
D. voltage controlled current source

A non inverting closed loop op amp circuit generally has a gain factor______________?

A. Of zero
B. Greater than one
C. Less than one
D. Equal to one

The closed-loop voltage gain of an inverting amplifier equal to______________?

A. The ratio of the input resistance to feedback resistance
B. The input resistance
C. The feedback resistance divided by the input resistance
D. The open-loop voltage gain

Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5kΩ and C1 = 0.05μF___________?

A. 1.273kHz
B. 127.3 kHz
C. 12.73kHz
D. 127.3 Hz

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