For the circuit in figure, the phase current $${{\rm I}_1}$$ is

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 h parameters of the circuit shown in Fig. are

Choose the function f (t );−$$\infty$$ < 1 < +$$\infty$$, for which a Fourier series cannot be defined.