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.

QUIZZES

WHO SAID IT: A QUIZ ON PRESIDENTIAL WIT AND WISDOM

Think you know your presidents? Take this quiz and see if you can match the style, wit, and ideology of these memorable lines to the right POTUS.
Question 1 of 9
“I do believe that the buck stops here, that I cannot rely upon public opinion polls to tell me what is right. I do believe that right makes might and that if I am wrong, 10 angels swearing I was right would make no difference.”
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.