Parallel Plate Capacitor

CHAPTER 4

4.1 Parallel Plate Capacitor
A parallel plate capacitor is formed by two plates separated by a distance d. If A is the area between the two plates the capacitance between the two plates is given by


where,

d = separation between the plates
A = Area of each plate
= permittivity of free space or 0.225 pF /inch
= relative permittivity of the medium between the plates


Figure 4.3 - Parallel plate capacitor

There are therefore three factors upon which the capacitance of a parallel plate capacitor depends the area of the overlap, the separation between the plates and the dielectric constant of the material between the plates.




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