A capacitor is a passive electronic
component that stores energy in the form of an electrostatic
field. In its simplest form, a capacitor consists of two
conducting plates separated by an insulating material called
the dielectric. Capacitance is directly proportional to the
surface areas of the plates, and is inversely proportional
to the plates' separation.
Capacitance also depends on the dielectric constant of the
dielectric material separating the plates.
The standard units of Capacitance,
microfarad: µF (1 µF = 10-6 F)
nanofarad: nF (1 nF = 10-9 F)
picofarad: pF (1 pF = 10-12 F)