Electronic Devices - Operational Amplifiers

Why Electronic Devices Operational Amplifiers?

In this section you can learn and practice Electronic Devices Questions based on "Operational Amplifiers" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc.) with full confidence.

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You can easily solve all kind of Electronic Devices questions based on Operational Amplifiers by practicing the objective type exercises given below, also get shortcut methods to solve Electronic Devices Operational Amplifiers problems.

Exercise :: Operational Amplifiers - General Questions

1. 

In which of the following are operational amplifiers (op-amps) used?

A. Oscillators
B. Filters
C. Instrumentation circuits
D. All of the above

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

2. 

Refer to this figure. If the value of R1 decreases, the voltage gain will ________ and the input impedance will ________.

A. increase, increase
B. increase, decrease
C. decrease, decrease
D. decrease, increase

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

3. 

Refer to this figure. The purpose of R3 is

A. for bias current compensation.
B. for input offset voltage compensation.
C. to set input impedance.
D. to set input impedance and voltage gain.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

4. 

A voltage-follower amplifier comes to you for service. You find the voltage gain to be 5.5 and the input impedance 22 k. The probable fault in this amplifier, if any, is

A. the gain is too low for this type of amplifier.
B. the input impedance is too high for this amplifier.
C. nothing is wrong. The trouble must be somewhere else.
D. none of these.

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

5. 

For an op-amp having a slew rate SR = 5 V/ms, what is the maximum closed-loop voltage gain that can be used when the input signal varies by 0.2 V in 10 ms?

A. 150
B. 200
C. 250
D. 300

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.