An amplifier without feedback has a voltage gain of 50,input resistance os 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current shunt negative feedback amplifier using the above amplifier with a feedbacik factor of 0.2 is

• A. 5KΩ
• B. 1/5KΩ
• C. 1/11KΩ
• D. 11KΩ

Answer: (C)