In an operational amplifier, the output voltage is determined by the difference between the two input voltages multiplied by the ________ of the op-amp.

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bandwidth

gain

input impedance

offset voltage

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Answer

In an operational amplifier the output voltage is the difference between the two input voltages multiplied by the op‑amp’s gain, which is the ratio of the output to the input differential voltage. The gain is a very large number, often thousands or millions, so a tiny voltage difference at the inputs can produce a large output voltage. For example, if the input difference is 1 mV and the gain is 10 000, the output will be 10 V. The gain is set by the internal circuitry and the external feedback network. Thus the output voltage equals the input difference times the op‑amp’s gain.

Detailed Explanation

Gain tells how many times the op‑amp amplifies the voltage difference. Other options are incorrect because Bandwidth means the range of frequencies the op‑amp can handle; Input impedance is how much resistance the input sees.

Key Concepts

Operational Amplifier Dynamics

Signal Amplification

Transistor Configuration

Topic

Internal Components of Op-Amps

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hard level question

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Question 1

In an operational amplifier (Op-Amp) circuit, when the output saturates, which of the following statements best describes the relationship between the input voltage and the output voltage within the voltage range?

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Question 2