The path followed by electrons from a power source (generator or battery), through an electrical system, and returning to the source.

The flow of electrical energy (electricity) in a conductor, measured in amperes.

A movement of electrons: An electric current consists of charged particles moving through a conductor usually consisting of electrons.

The electrons in some atoms; such as, copper and aluminum, are free to move and to jump from one atom to another and such materials are known as "conductors".

Other materials, such as wood, do not contain as many moving electrons, and so they are called "insulators", and when a material is neither completely a conductor nor an insulator, it is called a "semiconductor".

When an electric current moves continuously in one direction, it is called a "direct current", and when the current fluctuates rapidly back and forth, it is called an "alternating current".

Alternating current is used in almost all worldwide household wiring today while direct current is commonly seen in battery-operated devices.

The ability of an electric current to produce work, heat, light, or other forms of energy: Electric energy is measured in kilowatt hours.

The sector that creates electricity by transforming different energy sources into electrical energy: The electric generation industry refers to the stationary and mobile generating units that are connected to the electric power grid and can generate electricity.

The electric generation industry includes the "electric power sector" (utility generators and independent power producers) and industrial and commercial power generators, including combined-heat-and-power producers, but excluding units at single-family dwellings.

An electric-run conveyance that either operates solely on electricity, but contains an internal combustion motor that generates additional electricity (series hybrid): An electric hybrid vehicle can also contain an electric system and an internal combustion system and is capable of operating on either system (a parallel hybrid).

A machine that uses electricity and magnetism to power an axle: An electric motor converts electrical energy into mechanical energy.

A road motorized conveyance that is driven by electrical energy: An electric motor vehicle is powered by an electric motor that draws current from rechargeable storage batteries, fuel cells, photovoltaic arrays, or other sources of electric current.