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Electronic Devices - Operational Amplifiers

Exercise : Operational Amplifiers - General Questions
1.
In which of the following are operational amplifiers (op-amps) used?
Oscillators
Filters
Instrumentation circuits
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.

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

increase, increase
increase, decrease
decrease, decrease
decrease, increase
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.

Refer to this figure. The purpose of R3 is

for bias current compensation.
for input offset voltage compensation.
to set input impedance.
to set input impedance and voltage gain.
Answer: Option
Explanation:
No answer description is available. Let's 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
the gain is too low for this type of amplifier.
the input impedance is too high for this amplifier.
nothing is wrong. The trouble must be somewhere else.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's 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?
150
200
250
300
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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