An inductor 20 mH, a capacitor 100 $$\mu $$F and a resistor 50 $$\Omega $$ are connected in series across a source of emf, V = 10 sin 314 t. The power loss in the circuit is

The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance

Figure shows a circuit that contains three identical resistors with resistance R = 9.0 $$\Omega $$ each, two identical inductors with inductance $$L$$ = 2.0 mH each, and an ideal battery with emf $$\varepsilon = 18V$$. The current $$i$$ through the battery just after the switch closed is

A 100 $$\Omega $$ resistance and a capacitor of 100 $$\Omega $$ reactance are connected in series across a 220 V source. When the capacitor is 50% charged, the peak value of the displacement current is