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Question & Answer
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The gain is constant and independent of the differential input voltage.
The gain increases linearly with the differential input voltage.
The gain is proportional to the rate of change of the differential input voltage.
The gain is determined by the feedback resistor only.
Understanding the Answer
Let's break down why this is correct
In a differentiator the op‑amp uses a capacitor in the feedback path. Other options are incorrect because Some think the gain is fixed by resistors alone; It is easy to believe the gain is linear with the input voltage because many amplifiers are voltage‑controlled.
Key Concepts
Operational Amplifiers Basics
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Definition
Operational amplifiers (op-amps) are devices that amplify the difference between their two inputs by a large gain factor. They have five terminals, including power supply terminals, inverting and non-inverting inputs, and an output terminal.
Topic Definition
Operational amplifiers (op-amps) are devices that amplify the difference between their two inputs by a large gain factor. They have five terminals, including power supply terminals, inverting and non-inverting inputs, and an output terminal.
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