RRB JE 2019: Op- Amp Quiz 1

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Question 1

In an ideal op-amp the output impedance is

• A 50 ohm
• B 100 ohm
• C Infinite
• D Zero

Question 2

A sinusoidal input which can be reproduced in an OP-AMP without any distortion having slew rate of 10V/s and 5V peak output amplitude, has the maximum frequency of

• A1KHz.
• B1Hz.
• C31.42KHz.
• D31.42MHz.

Question 3

For a voltage follower circuit using an op-amp, which of the following is true?

• Aboth input and output impedance are very large
• Binput impedance is very large and the output impedance is very small
• Cinput impedance is very small and the output impedance is very large
• Dboth input and output impedance are very small

Question 4

A differential amplifier is used in the input stage of Op-Amps to achieve very high

• Aopen -loop gain
• Bbandwidth
• Cslew rate
• DCMRR

Question 5

In the ideal Op-amp circuit shown, Vo is,

• A 2 V_s
• B -2 V_s
• C 3 V_s
• D -3 V_s

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