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Created page with 'File:lighterstill.jpgright|frame *Date: [http://www.wikipedia.org/wiki/17th_Century 1616] ==Definitions== *1 a : a class of physical phenomena...'
[[File:lighterstill.jpg]][[File:Magnetism.jpg|right|frame]]

*Date: [http://www.wikipedia.org/wiki/17th_Century 1616]
==Definitions==
*1 a : a class of [[physical]] [[phenomena]] that include the [[attraction]] for iron observed in lodestone and a magnet, are inseparably [[associated]] with moving [http://www.wikipedia.org/wiki/Electricity electricity], are exhibited by both magnets and electric currents, and are characterized by fields of [[force]]
:b : a [[science]] that deals with magnetic [[phenomena]]
*2 : an ability to [[attract]] or [[charm]]
==Description==
The term '''magnetism''' is used to describe how [[materials]] [[respond]] on the microscopic level to an applied [http://en.wikipedia.org/wiki/Magnetic_field magnetic field]; to categorize the magnetic [[phase]] of a material. For example, the most well known form of magnetism is [http://en.wikipedia.org/wiki/Ferromagnetism ferromagnetism] such that some ferromagnetic [[materials]] produce their own persistent magnetic field. However, all materials are [[influenced]] to greater or lesser [[degree]] by the [[presence]] of a magnetic field. Some are attracted to a magnetic field ([http://en.wikipedia.org/wiki/Paramagnetism paramagnetism]); others are repulsed by a magnetic field ([http://en.wikipedia.org/wiki/Diamagnetism diamagnetism]); others have a much more [[complex]] [[relationship]] with an applied magnetic field. Substances that are negligibly affected by magnetic fields are known as non-magnetic substances. They include copper, aluminium, water, gases, and plastic.

The magnetic state (or phase) of a [[material]] depends on temperature (and other variables such as pressure and applied magnetic field) so that a material may exhibit more than one form of magnetism depending on its temperature, etc.[http://en.wikipedia.org/wiki/Magnetism]

[[Category: Physics]]

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