Question

Considering the transformer to be ideal, the transmission parameter 'A' of the 2-port network shown in the figure below is

• A. 1.3
• B. 1.4
• C. 0.5
• D. 2.0

Answer 1

The correct option is A 1.3


$I_p=2I_{s}and{V}_s=2V_p$ ....(i)

$\because A={\begin{array}{c}\frac{V_1}{V_2}\end{array}|}_{I_2=0}$

$\therefore$ At $I_2=0$

$V_2=V_s=5I_s=2.5I_p$ ...(ii)

$V_1=V_p+2I_p$

from equation (i),

$V_1=\frac{V_s}{2}+2I_p$

from equation (ii),

$V_1=\frac{5}{4}{I}_p+2I_p$

$V_1=3.25I_p$ ...(iii)

from equation (ii) and (iii)

$A=\frac{V_1}{V_2}=\frac{3.25}{2.5}\frac{I_p}{I_p}=1.3$