Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
The gain of the op-amp is infinite, which allows for immediate response to input changes.
B
The feedback mechanism adjusts the input difference to zero, thereby stabilizing the output.
C
The power supply to the op-amp has reached its maximum limit.
D
The op-amp's output is saturated, causing it to stop responding to further input changes.
Understanding the Answer
Let's break down why this is correct
Answer
When an op‑amp is in a feedback loop, the output changes until the voltage difference between its two inputs is almost zero. The feedback network then forces the output to a value that keeps the inverting input at the same voltage as the non‑inverting input, which is usually ground. This balancing stops the output from changing further, so the voltage settles at a fixed level determined by the resistor ratios. For example, with a 1 kΩ input resistor and a 9 kΩ feedback resistor, the output will stabilize at about nine times the input voltage, illustrating how negative feedback fixes the output.
Detailed Explanation
The op‑amp uses negative feedback, which changes the output until the voltage difference between its two inputs is zero. Other options are incorrect because Some think an infinite gain makes the output jump instantly; The idea that the power supply limits the output is a misconception.
Key Concepts
Operational Amplifiers
Feedback Mechanisms
Saturation Effects
Topic
Operational Amplifiers Basics
Difficulty
medium level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1In an operational amplifier, how does negative feedback influence the output signal in common applications such as amplifiers and filters?
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2
Question 2When an operational amplifier is configured in a feedback loop and the output voltage is observed to stabilize at a certain value, what is the most likely cause of this stabilization?
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3
Question 3If an operational amplifier circuit consistently produces a lower output voltage than expected based on its specifications, what could be the underlying cause?
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4
Question 4In practical op-amp circuits, the behavior of the output voltage is primarily controlled by the feedback applied, leading to a predictable __________ behavior.
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5
Question 5If an operational amplifier (op-amp) produces a very large output voltage when given a small difference between its inputs, what could be the underlying cause of this behavior?
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6
Question 6In an operational amplifier, how does negative feedback influence the output signal in common applications such as amplifiers and filters?
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7
Question 7When an operational amplifier is configured in a feedback loop and the output voltage is observed to stabilize at a certain value, what is the most likely cause of this stabilization?
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8
Question 8If an operational amplifier circuit consistently produces a lower output voltage than expected based on its specifications, what could be the underlying cause?
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9
Question 9In practical op-amp circuits, the behavior of the output voltage is primarily controlled by the feedback applied, leading to a predictable __________ behavior.
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10
Question 10If an operational amplifier (op-amp) produces a very large output voltage when given a small difference between its inputs, what could be the underlying cause of this behavior?
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