The closed-loop voltage gain of an inverting amplifier equal to______________?
Correct answer: C. The feedback resistance divided by the input resistance
- A. The ratio of the input resistance to feedback resistance
- B. The open-loop voltage gain
- C. The feedback resistance divided by the input resistance
- D. The input resistance
Explanation
For an inverting amplifier, the closed-loop gain is Av = −Rf/Ri, so its magnitude is the feedback resistance divided by the input resistance. The negative sign represents phase inversion and is omitted in the listed ratio.
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