Magnetic Moment of Point Charge

AI Thread Summary
A stationary point charge does not experience a magnetic force from a moving charge, as it lacks a magnetic dipole moment. The magnetic potential energy of the stationary charge cannot be directly calculated using magnetic moment since it does not possess one. The magnetic field created by the moving charge can be calculated at the location of the stationary charge, but this does not translate into magnetic potential energy without a magnetic moment. The confusion arises from the need to relate the B field to potential energy, which is not applicable in this scenario. Understanding the distinction between electric and magnetic forces is crucial in this context.
Invyz
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Say I have a stationary point charge with a matching charge moving past it at a velocity. What is the magnetic potential energy of the stationary point charge? The formula for magnetic potential energy involves pole strength so I am confused. I can calculate the B field the stationary particle feels but to get the potential energy I need to dot product with the magnetic moment.
 
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How did you get on?

You can work out the magnetic field due to the moving charge at the position of the point charge.
But: does a stationary point electric charge feel a magnetic force?

note: a classical point charge does not have a magnetic dipole moment.
 
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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