What is meant by displacement current ? How is this current different from the conduction current? A capacitor is being charged by a source of emf. Justify the continuity of current in the circuit.

Displacement current is the current which arises due to the rate of change of electric field. Displacement current is due to a varying electric field. Conduction current is due to the motion of electrons in the presence of an electric field. When the capacitor is being charged by a source of emf, the electric field between the plates of the capacitor changes with time. It produces a displacement current $\displaystyle i_{d}$ whose magnitude is equal to the conduction current $\displaystyle i_{c}$. Therefore the current is continuous in the circuit.