Operational Amplifiers 1 Questions and Answers
Operational Amplifiers reasoning questions with answers cover critical topics such as op-amp characteristics, applications, and frequency response. These logical reasoning questions are designed to test analytical and conceptual clarity in electronics circuits. Practicing reasoning questions for competitive exams like GATE, ISRO, and BARC builds a deep understanding of amplifier operation and troubleshooting. Strengthen your preparation with detailed solutions and explanations that help simplify complex op-amp principles for exam success.
Operational Amplifiers 1
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36 questions
1. An ideal operational amplifier has
- infinite output impedance
- zero input impedance
- infinite bandwidth
- All of the above
2. Another name for a unity gain amplifier is:
- difference amplifier
- comparator
- single ended
- voltage follower
3. The open-loop voltage gain (Aol) of an op-amp is the
- external voltage gain the device is capable of
- internal voltage gain the device is capable of
- most controlled parameter
- same as Acl
4. A series dissipative regulator is an example of a:
- linear regulator
- switching regulator
- shunt regulator
- dc-to-dc converter
5. A noninverting closed-loop op-amp circuit generally has a gain factor:
- less than one
- greater than one
- of zero
- equal to one
6. In order for an output to swing above and below a zero reference, the op-amp circuit requires:
- a resistive feedback network
- zero offset
- a wide bandwidth
- a negative and positive supply
7. If ground is applied to the (+) terminal of an inverting op-amp, the (–) terminal will:
- not need an input resistor
- be virtual ground
- have high reverse current
- not invert the signal
8. An astable multivibrator is also known as a:
- one-shot multivibrator
- free-running multivibrator
- bistable multivibrator
- monostable multivibrator
9. With negative feedback, the returning signal:
- aids the input signal
- is proportional to output current
- opposes the input signal
- is proportional to differential voltage gain
10. What starts a free-running multivibrator?
- a trigger
- an input signal
- an external circuit
- nothing