domains - Note-A-Rific: Domains Magnetic field lines of a...

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Note-A-Rific: Domains Magnetic field lines of a bar magnet form a pattern much like that for the electric field (look at the images on page 677) Also, the attraction and repulsion between poles resembles the forces between charges. An important difference is that a positive or negative electric charge can easily be isolated, but so far the isolation of a single magnetic pole (north or south, but not both) has not been done. o If a bar magnet is cut in half you get two new magnets. o If the cutting is repeated, more magnets are produced, each with a north and a south pole. o Physicists have tried various ways to isolate a single magnetic pole without success. o This is an active research field today since certain theories suggest they should exist. Microscopic examination reveals that a magnet is actually made up of tiny regions known as “domains” They are at most about 1mm in length or width. Each domain behaves like a tiny magnet with a north and a south pole.
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This note was uploaded on 02/29/2012 for the course PHYS 227 taught by Professor Rabe during the Fall '08 term at Rutgers.

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domains - Note-A-Rific: Domains Magnetic field lines of a...

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