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Basic Op Amp Circuits Online Exam Quiz

Important questions about Basic Op Amp Circuits. Basic Op Amp Circuits MCQ questions with answers. Basic Op Amp Circuits exam questions and answers for students and interviews.

1. The ramp voltage at the output of an op-amp integrator

Options

A : increases or decreases at a linear rate

B : increases or decreases exponentially

C : is always increasing and never decreasing

D : is constant

2. In an averaging amplifier, the input resistances are

Options

A : equal to the feedback resistance

B : less than the feedback resistance

C : greater than the feedback resistance

D : unequal

3. A basic series regulator has

Options

A : an error detector

B : a load

C : a reference voltage

D : both an error detector and a reference voltage

4. When the capacitance in an active high-pass filter increases, the critical frequency decreases.

Options

A : True

B : False

C :

D :

5. The feedback component in an op-amp integrator is a capacitor.

Options

A : True

B : False

C :

D :

6. A zero-level detector is a type of comparator circuit.

Options

A : True

B : False

C :

D :

7. When used as a comparator , an op-amp is wired in a closed-loop configuration.

Options

A : True

B : False

C :

D :

8. To operate properly, an oscillator requires an external ac input signal.

Options

A : True

B : False

C :

D :

9. The output voltage of a summing amplifier is proportional to the product of the input voltages.

Options

A : True

B : False

C :

D :

10. The effectiveness of a filter in rejecting signals beyond cutoff frequency is a function of the filter roll-off rating.

Options

A : True

B : False

C :

D :

1. For a Wien-bridge oscillator to produce a sustained sine-wave output, the phase shift around the positive feedback loop must be greater than 0°.

Options

A : True

B : False

C :

D :

2. A two-pole active filter produces a roll-off rate of ?20 dB/decade .

Options

A : True

B : False

C :

D :

3. The control element in a basic shunt voltage regulator is a zener diode.

Options

A : True

B : False

C :

D :

4. A Wien-bridge oscillator uses _________.

Options

A : positive feedback

B : negative feedback

C : both types of feedback

D : an LC tank circuit

5. In order to sustain oscillations in a feedback oscillator, the gain should be _________ so the A cl _______.

Options

A : reduced, equals one

B : reduced, is less than one

C : increased, is more than one

D : increased, is much greater than one

6. The reference voltage for the comparator in the given circuit equals ______.

Options

A : 0 V

B : +8.8 V

C : +16 V

D : +7.2 V

7. In the given circuit, V IN1 equals ______.

Options

A : +4 V

B : +20 V

C : ?4 V

D : ?20 V

8. The ______________ input makes the summing amplifier circuit possible.

Options

A : virtual ground at the noninverting

B : virtual ground at the inverting

C : low-voltage

D : high-voltage

9. A mathematical operation that determines the rate of change of a curve is called __________.

Options

A : differentiation

B : integration

C : curve averaging

D : linear regression

10. A mathematical operation for finding the area under the curve of a graph is called __________.

Options

A : differentiation

B : integration

C : curve averaging

D : linear regression

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