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magnetic dipole

magnetic dipole in Science
magnetic dipole  
A model of an object that generates a magnetic field in which the field is considered to emanate from two opposite poles, as in the north and south poles of a magnet, much as an electric field emanates from a positive and a negative charge (each of which is a monopole) in an electric dipole. Even though the existence of magnetic monopoles as isolable particles has not been established, the magnetic dipole remains a useful simplification of the electrodynamics involved in magnetism. Magnetic dipoles experience torque in the presence of magnetic fields.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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