An amplifier without feedback has a voltage gain of 50,input resistance os 1 K�

Question

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

Options:

A . 1/11KΩ

B . 1/5KΩ

C . 5KΩ

D . 11KΩ

Answer: Option A

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