Capacitance

Capacitance is given by:

is the voltage between two conductors 1 and 2, then the capacitance will be:

For a parallel plate capacitor the capacitance is given by:

Where we have:
s: the area of the plates
d: the distance between the plates

: the voltage, which can be determined by

For a cylindrical capacitor the capacitance is given by:

Where we have:
L: the length of the cylinder
b: the outer radius
a: the inner radius

: the permittivity of the dielectric material in between

: the voltage, which can be determined by:

For a spherical capacitor the capacitance is given by:

Where we have:

: inner and outer radius

: the permittivity of the dielectric material in between.

: the voltage, which can be determined by: