Polarity of magnets, Simple?- confused me.

Thread starter Jjjxy
Start date Oct 2, 2011
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Confused Magnets Polarity

Oct 2, 2011

Jjjxy

I don't get it, is the north pole of a magnet the north seeking; having in mind that like poles repel? Please help.

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Oct 2, 2011

cmb

Unfortunately (perhaps against the interests of clarity), convention has determined that the 'North Pole' of the Earth is a magnetic south pole.

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...

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