An amplifier has input impedance of 4 k and output impedance of 80 k – McqOptions

MCQOPTIONS

1.	An amplifier has input impedance of 4 k and output impedance of 80 k . It is used in negative feedback circuit with 10?edback. If open loop gain is 90, the closed loop input and output impedances are
A.	40 k and 8 k respectively
B.	4 k and 80 k respectively
C.	0.4 k and 800 k respectively
D.	8 k and 160 k respectively
Answer» B. 4 k and 80 k respectively

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