How does electricity flow explained
Learn how electricity flows
(Electrical Theory)
In metals and certain other materials, negatively charged
particles called electrons are free to move around. These materials
are called conductors. When a battery is connected across a
conductor a potential difference is set up along it and electrons
'flow' down the "potential gradient". However, as electrons are
negatively charged, down the potential gradient is from the negative
to the positive end of the conductor.
This flow of electronic charge is called a current. It is described
as direct current (DC) if it flows continuously in one direction and
alternating current (AC) if its direction of flow alternates back
and forth.