Discussion
Statement I: Negative feedback reduces gain and increases bandwidth.
Statement II: Positive feedback increases gain and increases bandwidth.
In the light of the above statements, choose the correct answer.
Answer: D
The first is true and the second is half wrong: positive feedback increases gain but narrows bandwidth, since every effect of negative feedback reverses. That reversal is consistent across all its consequences - distortion grows, impedances move the other way, and sensitivity to the open-loop gain increases. Learning the negative case thoroughly gives the positive case by inspection, provided the reversal is applied to every term rather than just the gain.
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