# Solved Problems-9

Problems-9

A network has two input terminals

*a*,*b*and two output terminals*c*,*d*. The input impedance with*c*-*d*open-circuited is (250 +*j*100) ohm and with*c*-*d*short-circuited is (400 +*j*300) ohm. The impedance across*c-d*with*a-b*open-circuited is 200 ohm. Determine the equivalent*T*-network parameters.Solution

For

*c*-*d*Terminals opened,(i)

But, for

*c*-*d*terminals shorted,(ii)

Again, with

*a-b*terminals opened,(

*Z*+_{B}*Z*) = 200 (iii)_{C}From (ii) and (i), we get,

or {by (iii)

or