Editing Electromagnetic field (section)

=== Reciprocal behavior of electric and magnetic fields ===
{{Main | Faraday's law of induction | Ampère's circuital law }}
The two Maxwell equations, Faraday's Law and the Ampère–Maxwell Law, illustrate a very practical feature of the electromagnetic field. Faraday's Law may be stated roughly as "a changing magnetic field inside a loop creates an electric voltage around the loop". This is the principle behind the [[electric generator]].

Ampere's Law roughly states that "an electrical current around a loop creates a magnetic field through the loop". Thus, this law can be applied to generate a magnetic field and run an [[electric motor]].