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connecting capacitors in serial or parallel with electronic or mechanical switches
Capacitance can be calculated if the geometry of the conductors and the dielectric properties of the insulator between the conductors are known.
For example, the capacitance of a parallel-plate capacitor constructed of two parallel plates both of area A separated by a distance d is
approximately equal to the following:
C = (εr*ε0*A) / d
A is the area of overlap of the two plates;
εr is the relative static permittivity (sometimes called the dielectric constant) of the material
between the plates (for a vacuum, εr = 1);
ε0 is the electric constant (ε0 ≈ 8.854×10−12 F m–1); and
d is the separation between the plates.
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