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The ABCD parameters of the 2-port network shown in the figure are—
Correct Option: B
The standard equation for ABCD parameters are 
V1 = A V2 – B I2 ....(i)
I1 = C V2 – D I2 ....(ii)
From the given figure
V1 = Z I1 + Z (I1 + I2)
or
V1 = 2 Z I1 + Z I2 ....(iii)
V2 = Z I1 + Z I2 ....(iv)
Equation (iii) can be written as
V1 = 2 V2 – Z I2 ....(v)
I1 = V2 Z – I2 ....(vi)
on comparing equation (v) and (vi) with the standard equation (i) and (ii) we get.
A = 2
B = Z
C= 1/2
D = 1
