What are the physics behind a homopolar motor? How does a homopolar motor work? and why?

Thursday, June 25th, 2009 | Physics

golden c asked:


In physics terms, can someone please explain how a homopolar motor works? Like… I know how to make one, but why does the copper wire spin around the battery and magnet? What forces cause this? Please post a detailed explanation of this phenomenon.

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  2. From a chemistry andor physics point of view. How do you explain pepper repelling from dish soap? Mike asked: You know when you put ground pepper...
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1 Comment to What are the physics behind a homopolar motor? How does a homopolar motor work? and why?

Paschal H
June 27, 2009

If this is the one with the screw, battery, magnet and wire… there was an explanation on the website.

Basicly the current flows from the center of the magnet to the side where you touch the wire. This is perpendicular to the magnetic field of the magnet. The interaction of the induced field and the field from the magnet causes the rotation.

I can’t give it better than this , sorry.

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