OP AMP Circuits Mcqs - Set 1

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_______________?

a. 10 volts
b. 5 volts
c. 5/ volts
d. 5/2 volts
Answer  Explanation 

ANSWER: 5/2 volts

Explanation:
No explanation is available for this question!

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______________?

a. 50KHz
b. 100KHz
c. 1000/17KHz
d. 1000/7.07KHz
Answer  Explanation 

ANSWER: 50KHz

Explanation:
No explanation is available for this question!

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______________?

a. CMMR
b. Bandwidth
c. Slew rate
d. Open-loop gain
Answer  Explanation 

ANSWER: Slew rate

Explanation:
No explanation is available for this question!

4)   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
Answer  Explanation 

ANSWER: Sine wave

Explanation:
No explanation is available for this question!

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

a. 2
b. 1
c. 1/2
d. 0
Answer  Explanation 

ANSWER: 2

Explanation:
No explanation is available for this question!

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

a. Non inverter
b. Voltage follower
c. Summer
d. Difference amplifier
Answer  Explanation 

ANSWER: Summer

Explanation:
No explanation is available for this question!

7)   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
Answer  Explanation 

ANSWER: A ramp

Explanation:
No explanation is available for this question!

8)   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
Answer  Explanation 

ANSWER: The current from output terminal is zero

Explanation:
No explanation is available for this question!

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________________?

a. 23dB
b. 25dB
c. 46dB
d. 50dB
Answer  Explanation 

ANSWER: 23dB

Explanation:
No explanation is available for this question!

10)   Differential amplifiers are used in______________?

a. Instrumentation amplifiers
b. Voltage followers
c. Voltage regulators
d. Buffers
Answer  Explanation 

ANSWER: Instrumentation amplifiers

Explanation:
No explanation is available for this question!

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