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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