A device made up of two metallic plates separated by a dielectric (insulating material). Used to store electrical energy in the electrostatic field between the plates. It produces an impedance to an ac current.
A circuit element formed by placing an insulating layer between two conducting layers; its function is to store a measure of electrical charge until needed. It is a very important component of memory chips.
are simple, non-semiconductor electrical components, the current through which is related to the rate at which voltage changes across it.