Electricity is the set of physical phenomena associated with the presence
and motion of matter that has a property of electric charge. Electricity is
related to magnetism, both being part of the phenomenon of electromagnetism,
as described by Maxwell's equations. Various common phenomena are related to
electricity, including lightning, static electricity, electric heating,
electric discharges and many others.
The presence of either a positive or negative electric charge produces an
electric field. The movement of electric charges is an electric current and
produces a magnetic field. In most applications, a force acts on a charge with
a magnitude given by Coulomb's law. Electric potential is typically measured
in volts.