OP-AMP Circuits MCQs

1.An operational amplifier has a slew rate of 5 V/μs. What is the maximum peak output voltage of a sine wave at a frequency of 1 MHz that the amplifier can produce without distortion?

2.Given a 741 operational amplifier with a gain-bandwidth product of 1 MHz, what is the -3 dB bandwidth of a non-inverting amplifier configured with this op-amp and a voltage gain of 20 dB?

3.Why is a differential amplifier consistently employed at the input stage of operational amplifiers?

To enhance common-mode rejection ratioTo increase the frequency response rangeTo achieve a very high input impedanceTo provide a large open-loop gainTo improve the output voltage swing

4.Consider the ideal op-amp circuit shown in the figure. If the input voltage Vi is a triangular waveform, what will be the shape of the output voltage V0?

5.If a differential amplifier has a differential gain of 20,000 and a Common Mode Rejection Ratio (CMRR) of 80 dB, what is the value of the common mode gain?

6.Which type of amplifier is commonly utilized in a digital-to-analog converter?

7.What type of output does an op-amp integrator produce when a step input is applied?

A steadily increasing ramp signalA sine waveA square waveA biased triangular waveform

8.Which statement accurately describes an ideal operational amplifier?

There is no voltage difference between the input terminals.No current flows into the input terminals.No current is drawn from the output terminal.The output has zero internal resistance.

9.If a differential amplifier has a differential voltage gain of 48 dB and a common-mode voltage gain of 2 dB, what is its common-mode rejection ratio (CMRR)?

23 dB25 dB46 dB50 dB

10.In which of the following applications are differential amplifiers primarily utilized?

Instrumentation amplifiersVoltage follower circuitsVoltage stabilization devicesSignal buffering components

11.What are the names of the two input terminals of an operational amplifier?

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

Av + AcAv / Ac1 + Av / AC.Ac / Av

13.Why is hysteresis an important feature in a Schmitt trigger circuit?

Because energy needs to be stored and released by parasitic capacitorsSince it helps to counteract temperature variationsTo provide sufficient time for components to reach saturation and then recoverIt helps avoid erroneous switching caused by noise interference

14.What is the output voltage (Vo) of the given circuit?

-6 volts-5 volts-1.2 volts-0.2 volts

15.What is the value of the current ix in the given circuit?

0.6 amperes0.5 amperes0.2 amperes1/12 amperes

16.An operational amplifier has a slew rate of 5 V/µs. What is the maximum peak output voltage of a sine wave at a frequency of 1 MHz that the op-amp can produce without distortion?

17.What is the estimated input impedance of an op-amp circuit with input resistance (Ri) of 10kΩ, feedback resistance (Rf) of 100kΩ, and load resistance (RL) of 10kΩ?

Infinite120 kΩ110 kΩ10 kΩ

18.An operational amplifier with a slew rate of 1 V/µs is configured to provide a gain of 40 dB. To ensure the amplifier can accurately amplify sinusoidal inputs from DC up to 20 kHz without distortion caused by slew rate limitations, what is the maximum allowable input signal amplitude?

19.What type of ideal device is an ideal operational amplifier (OP-AMP)?

A current-driven current sourceA current-driven voltage sourceA voltage-driven voltage sourceA voltage-driven current source