Magnets vibrating near a current?

AI Thread Summary
When a magnet is moved near a current-carrying conductor, it experiences vibrations due to the interaction between its magnetic field and the magnetic field generated by the current. This phenomenon is explained by Ampere's Law, which quantifies the magnetic field produced by electric currents. The vibrations occur because the magnet feels forces of attraction or repulsion from the current's magnetic field. Essentially, the current behaves like a magnet, influencing the behavior of the nearby magnet. This interaction illustrates fundamental principles of electromagnetism.
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In school yesterday I was doing a practical and when I moved a small 1.5T block magnet near a rheostat the magnet started vibrating, why does it do this?
 
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Energize said:
In school yesterday I was doing a practical and when I moved a small 1.5T block magnet near a rheostat the magnet started vibrating, why does it do this?
If you have a current, then that current will always generate a magnetic field. The formula for how big the magnetic field would be is given by Ampere's Law. So basically, you can treat the current as if it were a magnet too. So your original block magnet started to vibrate because it felt a force of magnetic attraction to or repulsion from your current.
 
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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Thread 'Why measure the speed of light in one direction?'

It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) . This value is a constant for the vacuum of free space and is independent of the motion of the observer. It was this fact, in part, that led Albert Einstein to Special Relativity.
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