Changes

[[File:lighterstill.jpg]][[File:Magnetism.jpg|right|frame]]

[[File:lighterstill.jpg]][[File:Magnetism.jpg|right|frame]]

*Date: [http://www.wikipedia.org/wiki/17th_Century 1616]

*Date: [https://www.wikipedia.org/wiki/17th_Century 1616]

==Definitions==

==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]]  

*1 a : a class of [[physical]] [[phenomena]] that include the [[attraction]] for iron observed in lodestone and a magnet, are inseparably [[associated]] with moving [https://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]]

:b : a [[science]] that deals with magnetic [[phenomena]]

*2 : an ability to [[attract]] or [[charm]]

*2 : an ability to [[attract]] or [[charm]]

==Description==

==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 term '''magnetism''' is used to describe how [[materials]] [[respond]] on the microscopic level to an applied [https://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 [https://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 ([https://en.wikipedia.org/wiki/Paramagnetism paramagnetism]); others are repulsed by a magnetic field ([https://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]

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.[https://en.wikipedia.org/wiki/Magnetism]

[[Category: Physics]]

[[Category: Physics]]