Question

When an ideal capacitor is charged by dc battery no current flows however when an ac source is used the current flows continuously how does unexplained is based on the concept of displacement current?

Answer 1

When an ideal capacitor is charged by dc battery, gets fully charged. Ideal capacitor means infinite resistance for dc.

When an ac source is connected to the capacitor current ,ic =dq/dt

continuously flows in the connecting wire .Due to changing current deposited on the plates of the capacitor change with time.This

causes change in electric fields between the plates of the capacitor which causes the electric flux to change and gives rise to a displacement the plates of the capacitor.