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Magnets

 
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RegisMoore



Joined: 03 Sep 2010
Posts: 1
Location: ILLNOIS

PostPosted: Sat Sep 04, 2010 1:13 am    Post subject: Magnets Reply with quote

Do mono-polar magnets exists and can you give an example? Also please explain the difference between a mono-polar, homo-polar and uni-polar magnets.

Thanks in advance
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hepcj
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Joined: 23 Jun 2007
Posts: 125

PostPosted: Tue Sep 07, 2010 1:00 pm    Post subject: Reply with quote

When a magnet is cut into two, each part will form another magnet with a north and south pole. The lines of flux always form closed loops.

It is unknown if magnetic monopoles exist. It has long been a puzzle for scientists why a single magnetic pole could not be isolated as electrical changes can. If a magentic monopole did exist it would have magnetic field lines that radiate out into space, like an isolated positive or negative charge.

Experiments are still looking for monopoles that fit the definition of an isolated particle. There is some evidence that monopoles can exist in so-called spin-ice.

http://www.scientificamerican.com/article.cfm?id=monopole-position

Although many scientists claim that these are not magentic monopole in sense of a single pole that exists in the absence of all other magnetic poles.

I have never heard the term mono-polar, homo-polar or uni-polar used in the context of magnetism but they are used to describe a type of electric motor.
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A physics teacher



Joined: 05 Sep 2009
Posts: 6
Location: Mauritius

PostPosted: Wed Sep 29, 2010 2:41 pm    Post subject: Magnet Reply with quote

As the first answer state there is at the moment no unipolar magnet. However there exist magnets from two poles upwards.
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