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- Magnet abstract "A magnet (from Greek μαγνήτις λίθος magnḗtis líthos, "Magnesian stone") is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone. Although ferromagnetic (and ferrimagnetic) materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism.Ferromagnetic materials can be divided into magnetically "soft" materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically "hard" materials, which do. Permanent magnets are made from "hard" ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a powerful magnetic field during manufacture, to align their internal microcrystalline structure, making them very hard to demagnetize. To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material. "Hard" materials have high coercivity, whereas "soft" materials have low coercivity.An electromagnet is made from a coil of wire that acts as a magnet when an electric current passes through it but stops being a magnet when the current stops. Often, the coil is wrapped around a core of "soft" ferromagnetic material such as steel, which greatly enhances the magnetic field produced by the coil.The overall strength of a magnet is measured by its magnetic moment or, alternatively, the total magnetic flux it produces. The local strength of magnetism in a material is measured by its magnetization.".
- Magnet thumbnail MagnetEZ.jpg?width=300.
- Magnet wikiPageExternalLink bulletin_jun_2012.pdf.
- Magnet wikiPageExternalLink how-its-made-mini-episodes-magnets.htm.
- Magnet wikiPageExternalLink 1380181562HistoryOfElectricityMagnetism-Infographic.pdf.
- Magnet wikiPageID "51079".
- Magnet wikiPageRevisionID "605887323".
- Magnet expiry "2014-06-15".
- Magnet hasPhotoCollection Magnet.
- Magnet small "yes".
- Magnet subject Category:Magnetism.
- Magnet subject Category:Types_of_magnets.
- Magnet comment "A magnet (from Greek μαγνήτις λίθος magnḗtis líthos, "Magnesian stone") is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field.".
- Magnet label "Aimant permanent".
- Magnet label "Imán".
- Magnet label "Magneet".
- Magnet label "Magnes".
- Magnet label "Magnet".
- Magnet label "Magnet".
- Magnet label "Magnete".
- Magnet label "Íman".
- Magnet label "Магнит".
- Magnet label "مغناطيس".
- Magnet label "磁石".
- Magnet label "磁鐵".
- Magnet sameAs Magnet.
- Magnet sameAs Magnet.
- Magnet sameAs Μαγνήτης.
- Magnet sameAs Imán.
- Magnet sameAs Iman.
- Magnet sameAs Aimant_permanent.
- Magnet sameAs Magnet.
- Magnet sameAs Magnete.
- Magnet sameAs 磁石.
- Magnet sameAs 자석.
- Magnet sameAs Magneet.
- Magnet sameAs Magnes.
- Magnet sameAs Íman.
- Magnet sameAs m.0dgr9.
- Magnet sameAs Q11421.
- Magnet sameAs Q11421.
- Magnet wasDerivedFrom Magnet?oldid=605887323.
- Magnet depiction MagnetEZ.jpg.
- Magnet isPrimaryTopicOf Magnet.
