Q.

Negative feedback in amplifiers –

A. increases bandwidth and decreases noise
B. decreases bandwidth and decreases noise
C. increases bandwidth and in-creases noise
D. decreases bandwidth and increases noise
Answer» A. increases bandwidth and decreases noise
Explanation: Voltage gain, input impedance, output impedance, bandwidth etc. are few important characteristics of an amplifier. These parameters are more or less constant for a given amplifier. Quite often, the values of these parameters are required to be controlled. This can be conveniently achieved by employing a technique, called the feedback.
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