# Operational Amplifier Circuits MCQs

Operational Amplifier Circuits MCQs. Multiple Choice Questions related to Operational Amplifier Circuits with Answers.

## Differential amplifiers are used in ?

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

A. Instrumentation amplifiers

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

A. 23dB

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

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

C. The current from output terminal is zero

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

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

A. A ramp

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

C. 795mV

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

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

C. Summer

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

A. 2

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

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

D. Sine wave

A. ∞
B. 120k
C. 110k
D. 10k