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Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
It amplifies the difference between its two input voltages.
B
It solely amplifies the larger of the two input voltages.
C
It outputs a constant voltage regardless of input changes.
D
It requires both inputs to be equal for any output.
Understanding the Answer
Let's break down why this is correct
Answer
An operational amplifier is a device that produces an output voltage proportional to the difference between two input voltages, with a very high internal gain. Because of this high gain, even a tiny voltage difference at its inputs can drive a large output voltage. By adding external resistors, the amplifier can be set to perform functions such as amplification, inversion, or summing of signals. For instance, wiring a 1 kΩ resistor from the input to the negative terminal and a 10 kΩ resistor from the output back to the negative terminal makes the op‑amp act as a 10‑times non‑inverting amplifier, turning a 1 V input into a 10 V output.
Detailed Explanation
An op‑amp makes a huge voltage that comes from the small difference between the two tiny voltages it sees. Other options are incorrect because Some think the op‑amp only copies the higher input, but that would ignore the small voltage difference it needs; The output is not a fixed number; it moves whenever the two inputs change.
Key Concepts
Operational Amplifiers
Amplification Principles
Differential Inputs
Topic
Operational Amplifiers Basics
Difficulty
medium level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1Which of the following scenarios best illustrates the application of an operational amplifier in a circuit?
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Question 2Which of the following statements about operational amplifiers are true? Select all that apply.
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Question 3Which of the following statements accurately describe the internal components and function of operational amplifiers (op-amps)? Select all that apply.
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4
Question 4Which of the following scenarios best illustrates the application of an operational amplifier in a circuit?
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Question 5Which of the following statements about operational amplifiers are true? Select all that apply.
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Question 6Which statement best describes the function of an operational amplifier?
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Question 7Which of the following scenarios best illustrates the application of an operational amplifier in a circuit?
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Question 8Which of the following statements about operational amplifiers are true? Select all that apply.
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Question 9Which statement best describes the function of an operational amplifier?
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