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Magnetic Field. Area around a magnet where the magnetic “force” could affect other objects. [http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/MagneticField/gifs/B-FieldMagnet.jpg]. Magnetic Field. Compass needles are magnets that can rotate when placed in a magnetic field.
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Magnetic Field • Area around a magnet where the magnetic “force” could affect other objects. [http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/MagneticField/gifs/B-FieldMagnet.jpg]
Magnetic Field • Compass needles are magnets that can rotate when placed in a magnetic field. [http://www.school-for-champions.com/science/images/magnetic_detection2.jpg]
Magnetic Field • Field lines are always drawn from North to South on a magnet. Magnetic Poles [http://www.wfu.edu/physics/pira/ResourceCD/ResourceImages/PhysicsDrawings/Magnetic_Field_Lines.gif]
Magnetic Force • Opposite poles will attract. [http://www.bbc.co.uk/schools/ks3bitesize/science/images/sci_dia_75.gif]
Magnetic Force • Same poles will repel. [http://www.bbc.co.uk/schools/ks3bitesize/science/images/sci_dia_75.gif]
Magnetic Force • Stronger forces exist when magnets are close to one another. Click here for a magnetic force demonstration.
Magnetic Force • Only certain metals are magnetic. (ex: iron, cobalt, nickel) • These metals can act like magnets when their magnetic domains are aligned. [http://www.mcdl.net/i/magnetic_domains.gif]
Magnetic Force • Permanent magnets are created when a magnetic metal is surrounded by a strong magnetic field. • This can be accomplished by using electric current! Click Here for an Electricity & Magnetism Demo