42. If the input impedance of an amplifier is Zin without feedback, then with negative voltage feedback, its value will be ………..
(a) Zin/(1+Avmv)
(b) Zin (1 + Av mv)
(c) (1+Avmv)/Zin
(d) Zin (1 – Av mv)Subject Name : Electronics Engineering Exam Name : IIT GATE, UPSC ESE, RRB, SSC, DMRC, NMRC, BSNL, DRDO, ISRO, BARC, NIELIT Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant Electronics & Communication Engineering Books
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