Basic op-Amp Circuits 2 Questions and Answers

Practice Mode
Showing 10 of 12 questions
Q1
The center frequency of a band-pass filter is always equal to the
  • A bandwidth
  • B –3 dB frequency
  • C bandwidth divided by Q
  • D geometric average of the critical frequencies
Answer: Option D
Q2
A zero-level detector is a
  • A comparator with a sine-wave output
  • B comparator with a trip point referenced to zero
  • C peak detector
  • D limiter
Answer: Option B
Q3
A digital-to-analog converter is an application of the
  • A scaling adder
  • B voltage-to-current converter
  • C noninverting amplifier
  • D adjustable bandwidth circuit
Answer: Option A
Q4
If the value of resistor Rf in an averaging amplifier circuit is equal to the value of one input resistor divided by the number of inputs, the output will be equal to
  • A the average of the individual inputs
  • B the inverted sum of the individual inputs
  • C the sum of the individual inputs
  • D the inverted average of the individual inputs
Answer: Option D
Q5
If the input to a comparator is a sine wave, the output is a
  • A ramp voltage
  • B sine wave
  • C rectangular wave
  • D sawtooth wave
Answer: Option C
Q6
A basic series regulator has
  • A an error detector
  • B a load
  • C a reference voltage
  • D both an error detector and a reference voltage
Answer: Option D
Q7
A comparator is an example of a(n)
  • A active filter
  • B current source
  • C linear circuit
  • D nonlinear circuit
Answer: Option D
Q8
Initially, the closed-loop gain (Acl) of a Wien-bridge oscillator should be
  • A Acl < 3
  • B Acl > 3
  • C 0
  • D Acl approxequalto.gif 1
Answer: Option B
Q9
In an averaging amplifier, the input resistances are
  • A equal to the feedback resistance
  • B less than the feedback resistance
  • C greater than the feedback resistance
  • D unequal
Answer: Option C
Q10
A triangular-wave oscillator can consist of an op-amp comparator, followed by a(n)
  • A differentiator
  • B amplifier
  • C integrator
  • D multivibrator
Answer: Option C

📚 More from Electronics

← All Topics 🎯 Practice ⏱️ Take Test 🔍 Search
Electronics
Back to Electronics
Other Subjects
Questions and Answers for Competitive Exams Various Entrance Test