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Magnetic Conclusions. Some Magnet Facts:. Magnet: a material that attracts iron (or an iron alloy), nickel or cobalt (as well as other magnets). It has a magnetic field and 2 poles. The North Pole of a magnet that is allowed to swing freely will point north Magnets will always have 2 poles
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Some Magnet Facts: • Magnet: a material that attracts iron (or an iron alloy), nickel or cobalt (as well as other magnets). It has a magnetic field and 2 poles. • The North Pole of a magnet that is allowed to swing freely will point north • Magnets will always have 2 poles • Poles are called: North and South (the pole that points N is North) • Like poles repel • Opposite poles attract
Magnetic Strength • Magnetic strength is strongest at the poles • Strength depends on the material that makes up the magnet , the temperature of the magnet, the distance from the magnet, how often the magnet has been hit, how the magnet was made (electromagnet verses a temporary magnet) as well as its size
Natural Magnets and Magnetic Force Natural magnets contain the mineral magnetite (permanently magnetized rock with magnetite is called a lodestone) Magnetic Force = the attraction or repulsion between magnet poles (produced when fields interact)
Magnetic Fields • Magnetic Field: Area around the magnet where the magnetic force is felt • The magnetic field lines are invisible, but can be shown with iron filings http://fphoto.photoshelter.com
Magnetic Field Line Facts • Magnetic Field lines: • Arrows go from N pole to S pole • Are closest together at the poles (where magnetic force is strongest) • Form complete loops that curve around the magnet bbc.co.uk
Field Line Drawings With 1 Magnet • Single magnetic field: one magnet http://hendrix2.uoregon.edu http://www.tritec-inc.org
Field Line Drawings Between 2 Magnets • Combined magnetic field: 2 (+) magnets AttractRepel bbc.co.uk