For the two port network shown in Fig. the admittance matrix is

Energy stored in a capacitor over a cycle, when excited by an $$a.c.$$ source is

For the circuit shown in Fig, the Norton equivalent source current value is _________ $$A$$ and its resistance is ___________ $$Ohms$$

A $$10$$ $$V$$ battery with an internal resistance of $$1\,\Omega $$ is connected across a nonlinear load whose $$V-1$$ characteristic is given by $$7{\rm I} = {V^2} + 2V.$$ The current delivered by the battery is ............... $$A.$$