Voltage Series (feedback also called series-shunt feedback) results in

Solution (By Examveda Team)

Option A: Increase in both input & output impedances is incorrect because voltage series (series-shunt) feedback does not increase both input and output impedances. While it does increase the input impedance, it decreases the output impedance. Therefore, this option does not correctly describe the effect of series-shunt feedback.

Option B: Decreases in both input & output impedances is incorrect because voltage series feedback actually increases the input impedance and decreases the output impedance. Hence, this option is not applicable.

Option C: Increase in input impedance & decreases in output impedance is correct because when voltage series feedback (also known as series-shunt feedback) is applied, it increases the input impedance and decreases the output impedance. This makes the amplifier more stable and improves its performance in certain applications.

Option D: Decrease in input impedance & increase in output impedance is incorrect because voltage series feedback increases the input impedance, not decreases it, and it also decreases the output impedance, not increases it. Therefore, this option does not describe the behavior of voltage series feedback.

Conclusion: The correct answer is Option C: Increase in input impedance & decreases in output impedance because voltage series (series-shunt) feedback increases the input impedance while decreasing the output impedance, improving amplifier performance.