How is the changing electric filed between the plates of a parallel plate capacitor during its charging, related to the idea of displacement current?

Find out the area of the plates of a 1F parallel plate capacitor (Given d= 5mm)

The distance between the plates of a parallel plate capacitor is 5 mm and the area of either plate is 2m^2 . If n potential of 3000 volt is applied to the capacitor, estimate its capacity, charge on either of the plates and the electric field.

A parallel plate capacitor is filled by copper plate of thickness b. The new capacity will be

In the above diagram, a particle of mass"m" and charge(-q) initially moving along X-axis with velocity "v". The length of the plave system is "L" and uniform electric filed between the plates is "E". What is the vertical deflext of the particle at the far edge of the plate?