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|DANGER HIGH VOLTAGE||by oskay on Flickr|
Electricity is the science, engineering, technology and physical phenomena associated with the presence and flow of electric charges. Electricity gives a wide variety of well-known electrical effects, such as lightning, static electricity, electromagnetic induction and the flow of electrical current in an electrical wire. In addition, electricity permits the creation and reception of electromagnetic radiation such as radio waves.
|Electrical closeup||by scottbb on Flickr|
- Electric charge: a property of some subatomic particles, which determines their electromagnetic interactions. Electrically charged matter is influenced by, and produces, electromagnetic fields.
- Electric current: a movement or flow of electrically charged particles, typically measured in amperes.
- Electric field (see electrostatics):
an especially simple type of electromagnetic field produced by an
electric charge even when it is not moving (i.e., there is no electric current). The electric field produces a force on other charges in its vicinity. Moving charges additionally produce a magnetic field.
- Electric potential: the capacity of an electric field to do work on an electric charge, typically measured in volts.
- Electromagnets: electrical currents generate magnetic fields, and changing magnetic fields generate electrical currents
|H�gase la lu'||by Libertinus on Flickr|
The movement of electric charge is known as an Electric Current, the intensity of which is usually measured in amperes.
Current can consist of any moving charged particles; most commonly
these are electrons, but any charge in motion constitutes a current.
|utility pole||by strollers on Flickr|
The process by which electric current passes through a material is termed Electrical Conduction,
and its nature varies with that of the charged particles and the
material through which they are travelling. Examples of electric
currents include metallic conduction, where electrons flow through a conductor such as metal, and electrolysis, where ions (charged atoms) flow through liquids.