The ABCD parameters of an ideal n:1 transformer shown in Fig. are $$\left[ {\matrix{ n & 0 \cr 0 & X \cr } } \right]$$. The value of X will be

The admittance parameter Y₁₂ in the 2-port network in Figure is

If each branch of a Delta circuit has impedance $$\sqrt 3 \,Z$$, then each branch of the equivalent Wye circuit has impedance

A 2-port network is shown in figure. The parameter $${h_{21}}$$ for this network can be given by