An amplifier without feedback has a voltage gain of 50,input resistanc – McqOptions

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1.	An amplifier without feedback has a voltage gain of 50,input resistance os 1 K & Output resistance of 2.5K .The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is___________?
A.	1/11K
B.	1/5K
C.	5K
D.	11K
Answer» B. 1/5K

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