Negative feedback in an amplifier

Solution (By Examveda Team)

Option A: Reduces gain is correct because negative feedback in an amplifier reduces the overall gain of the system. This reduction in gain, however, leads to improved linearity, reduced distortion, and better stability in the amplifier's operation.

Option B: Increase frequency & phase distortion is incorrect because negative feedback actually helps reduce both frequency and phase distortion. It enhances the fidelity of the amplifier by minimizing these distortions.

Option C: Reduces bandwidth is incorrect because negative feedback typically increases the bandwidth of an amplifier. It makes the amplifier more stable across a wider range of frequencies.

Option D: Increases noise is incorrect because negative feedback reduces the overall noise in an amplifier. By stabilizing the gain and reducing distortion, it typically lowers the noise figure of the amplifier.

Conclusion: The correct answer is Option A: Reduces gain because negative feedback decreases the amplifier's gain but improves its overall performance in terms of linearity, stability, and distortion reduction.