Basic Op-Amp Circuits MCQs

Question 1

A triangular-wave oscillator can consist of an op-amp comparator, followed by a(n)

Accepted Answer

integrator

Answer

differentiator

Answer

amplifier

Answer

multivibrator

Question 2

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

Accepted Answer

increases or decreases at a linear rate

Answer

increases or decreases exponentially

Answer

is always increasing and never decreasing

Answer

is constant

Question 3

A two-pole high-pass active filter would have a roll-off rate of

Accepted Answer

–40 dB/decade

Answer

40 dB/decade

Answer

20 dB/decade

Answer

–20 dB/decade

Question 4

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

Accepted Answer

integration

Answer

differentiation

Answer

curve averaging

Answer

linear regression

Question 5

Above the critical frequency (fc) of a low-pass filter, the output voltage gain _______.

Accepted Answer

decreases

Answer

does not change

Answer

doubles for every 1 kHz increase in frequency

Answer

increases

Question 6

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

Accepted Answer

reduced, equals one

Answer

reduced, is less than one

Answer

increased, is more than one

Answer

increased, is much greater than one

Question 7

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

Accepted Answer

differentiation

Answer

integration

Answer

curve averaging

Answer

linear regression

Question 8

A Wien-bridge oscillator uses _________.

Accepted Answer

both types of feedback

Answer

positive feedback

Answer

negative feedback

Answer

an LC tank circuit