A capacitor is a device with 2 conductors separated by
an insulator
If a DC current is applied to a capacitor a transient current flows but stops
when the potential difference between the conductors equals the potential of the source
If the source is removed the charge remains and can be
release as current
The capacitance measured in Farads (F) is equal to the amount of charge
on either electrode in Coulombs
divided by the potential difference between
the electrodes in volts - 1 Farad = 1 coulomb/volt
DC current will not flow through a capacitor - AC
current will and the higher
the frequency the better the conduction