Altering current through pure, inductor and pure capacitor is wattless

A capacitor of capacitance Chas initial charge Q_0 and connected to an inductor L as shown. At t=0 switch S is closed. The current through the inductor when energy in the capacitor is three times the energy of inductor is

What is the phase difference between A.C emf and current in the following : Pure resistor, pure inductor and pure capacitor.

Define the term power factor. What is the value of power factor for a pure resistor, pure inductor and pure capacitor?

Distinguish between a pure inductor and a pure resistor.

A capacitor and an inductor are connected in parallel across an ac source If the current through the inductor is 0.4 A and that through the capacitor is 0.3 A then the current drawn from the source is .