Editing Electric current (section)

==Occurrences==
Natural observable examples of electric current include [[lightning]], [[static electricity|static electric discharge]], and the [[solar wind]], the source of the [[polar aurora]]s.

Man-made occurrences of electric current include the flow of conduction electrons in metal wires such as the overhead power lines that deliver [[electric power transmission|electrical energy]] across long distances and the smaller wires within electrical and electronic equipment. [[Eddy current]]s are electric currents that occur in conductors exposed to changing magnetic fields. Similarly, electric currents occur, particularly in the surface, of conductors exposed to [[electromagnetic wave]]s. When oscillating electric currents flow at the correct voltages within [[radio antenna]]s, [[radio wave]]s are generated.

In [[electronics]], other forms of electric current include the flow of electrons through [[resistor]]s or through the vacuum in a [[vacuum tube]], the flow of ions inside a [[Battery (electricity)|battery]], and the flow of [[Electron hole|holes]] within metals and [[semiconductor]]s.  

A biological example of current is the flow of ions in [[neurons]] and nerves, responsible for both thought and sensory perception.