In the circuit of Fig., energy absorbed by the 4 Ω registor in the time interval (0,$$\infty$$) is

The necessary and sufficient condition for a rational function of s, T(s) to be driving point impedance of an RC network is that all poles and zeros should be

In the circuit of Fig., the current i_D through the ideal diode (zero cut in voltage and zero forward resistance) equals

For the circuit in Fig.

(a) Find the Thevenin equivalent of the sub circuit faced by the capacitor across the terminals a, b.

(b) Find $$v_c\left(t\right),\;t>0,\;given\;v_c(0)\;=\;0.$$

(c) Find i(t), t>0.