Basic op-Amp Circuits 2 Questions and Answers
Operational Amplifiers (Op-Amps) are integral components in analog electronics. In this section on Basic Op-Amp Circuits questions with answers, we cover key configurations like inverting, non-inverting, summing, and differential amplifiers. These concepts frequently appear in technical exams like GATE, ISRO, and BEL recruitment tests. Practicing electronics aptitude questions helps you understand gain calculation, feedback types, input/output impedance, and real-world Op-Amp applications. Each question includes detailed explanations to strengthen your fundamentals and improve your problem-solving approach. Use this section to master circuit design and analysis concepts essential for success in electronics-based exams.
Basic op-Amp Circuits 2
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12 questions
1. The center frequency of a band-pass filter is always equal to the
- bandwidth
- –3 dB frequency
- bandwidth divided by Q
- geometric average of the critical frequencies
2. A zero-level detector is a
- comparator with a sine-wave output
- comparator with a trip point referenced to zero
- peak detector
- limiter
3. A digital-to-analog converter is an application of the
- scaling adder
- voltage-to-current converter
- noninverting amplifier
- adjustable bandwidth circuit
4. 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
- the average of the individual inputs
- the inverted sum of the individual inputs
- the sum of the individual inputs
- the inverted average of the individual inputs
5. If the input to a comparator is a sine wave, the output is a
- ramp voltage
- sine wave
- rectangular wave
- sawtooth wave
6. A basic series regulator has
- an error detector
- a load
- a reference voltage
- both an error detector and a reference voltage
7. A comparator is an example of a(n)
- active filter
- current source
- linear circuit
- nonlinear circuit
8. Initially, the closed-loop gain (Acl) of a Wien-bridge oscillator should be
- Acl < 3
- Acl > 3
- 0
- Acl approxequalto.gif 1
9. In an averaging amplifier, the input resistances are
- equal to the feedback resistance
- less than the feedback resistance
- greater than the feedback resistance
- unequal
10. A triangular-wave oscillator can consist of an op-amp comparator, followed by a(n)
- differentiator
- amplifier
- integrator
- multivibrator