railway RRB JE (CBT I + CBT II) Mock Test 2024 Analog Electronics Oscillators and Feedback Amplifier
What are the input and output impedances of a voltage-series feedback amplifier?
Given:
Input impedance without feedback: Ri = 5 kΩ
Output impedance without feedback: Ro = 10 kΩ
Feedback factor: Aβ = 19
1
0.25 kΩ, 0.5 kΩ
2
100 kΩ, 200 kΩ
3
0.25 kΩ, 200 kΩ
4
100 kΩ, 0.5 kΩ