An amplifier without feedback has a voltage gain of 50, input resistance of 1 k&ohm; and output resistance of 2.5 k&ohm;. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 is

An amplifier without feedback has a voltage gain of 50, input resistan

1.	An amplifier without feedback has a voltage gain of 50, input resistance of 1 k&ohm; and output resistance of 2.5 k&ohm;. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 is
A.	1/11 k&ohm;
B.	1/5 k&ohm;
C.	5 kW
D.	11 kW
Answer» B. 1/5 k&ohm;