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Anonymous Poster

Single magnetic pole conundrum

11/16/2005 9:11 AM

dilip vaman ogale writes:
Take a sphere of magnetic material. Cut 12 equal conical pieces from it. Permanently magnetize all pieces so that the north pole is at center. Now glue them together to form a sphere again. Now you've created a sphere with only a south pole on periphery. Magnetic flux lines from the south pole can not reach the north pole at center. It seems we have created a single south pole, which contradicts the fundamental law of magnetism? Please explain.
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BRodda
The Feature Creep

Join Date: Feb 2005
Location: Boston, MA
Posts: 990
#1

Fallacy

11/16/2005 12:44 PM

The main problem with this argument is that this is not a single magnet, no matter how well glued together it is. Each individual piece still has a north and south pole. The fact that south poles are all aligned does allow for some interesting features, like putting it over a strong magnet and watching it float. In short a magnet, by law, has to have a north and south pole and this magnet assembly does have just that.

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Silas Marner
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Join Date: Oct 2005
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#2
In reply to #1

Re:Fallacy

11/16/2005 1:42 PM

Ding Ding - We have a winner!

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DougRH
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Join Date: Dec 2005
Location: AlBerta in western CAnada
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#3

Single magnetic pole conundrum

01/14/2006 12:38 AM

Hi, An interesting item. Has anyone actualy tried this and built one? It seems to me though that the device INTERNALLY would still be bi-polar as opposed to a mono-pole. The magnetic lines of force would still be connecting internally between the outer South pole and the internal North pole at the center. Externally, it probably would apear to be (mostly) magnetically inert. I wonder if there are any practical applications, such as sensors, for such a device?

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