Operational Amplifiers - General Questions Online Exam Quiz
Operational Amplifiers - General Questions GK Quiz. Question and Answers related to Operational Amplifiers - General Questions. MCQ (Multiple Choice Questions with answers about Operational Amplifiers - General Questions
In which of the following are operational amplifiers (op-amps) used?
Options
A : Oscillators
B : Filters
C : Instrumentation circuits
D : All of the above
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
Options
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.
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?
Options
A : 150
B : 200
C : 250
D : 300
An op-amp has an open-loop gain of 100,000 and a cutoff frequency of 40 Hz. Find the open-loop gain at a frequency of 30 Hz.
Options
A : 800
B : 8,000
C : 80,000
D : 100,000
What is the level of the voltage between the input terminals of an op-amp?
Options
A : Virtually zero
B : 5 V
C : 18 V
D : 22 V
An op-amp has an open-loop gain of 75,000 and a cutoff frequency of 100 Hz. At 1 kHz the open-loop gain is down by
Options
A : 10 dB.
B : 6 dB.
C : 20 dB.
D : 3 dB.
What is the difference output voltage of any signals applied to the input terminals?
Options
A : The differential gain times the difference input voltage.
B : The common-mode gain times the common input voltage.
C : The sum of the differential gain times the difference input voltage and the common-mode gain times the common input voltage.
D : The difference of the differential gain times the difference input voltage and the common-mode gain times the common input voltage.
A three-stage op-amp can have a maximum phase lag of ________°.
Options
A : –180
B : –90
C : –270
D : none of the above
The summing amplifier contains an inverting amplifier.
Options
A : True
B : False
C : -
D : -
What is the open-loop gain of an op-amp at the gain-bandwidth product of the op-amp?
Options
A : 200,000
B : 50,000
C : 200
D : 1
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