What are the causes of magnetism?

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The discussion centers on the causes of magnetism, specifically how moving charges create magnetic fields. It highlights that the scientific understanding of the exact mechanisms behind this phenomenon remains incomplete. One explanation involves the concept of frames of reference, where a magnetic field in one frame can be perceived as an electric field in another. Despite this explanation, some participants express confusion about the underlying principles. Overall, the complexities of magnetism and its relation to electric fields continue to challenge comprehension.
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What are the causes of magnetism?
 
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In classical E&M moving charges create B fields.
 


what happens in the motion of charges that magnetic fields are created?
 


To be honest I don't think science knows the answer to that question right now, But i could be worng
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

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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