magnetism

[rigadin]

Hi it's been a long time since I last logged in.

 

I have a really important question:

 

Is the magnetism around a magnet of the same sort as the magnetism around an electric line?????? If you don't understand my question just tell me.

[swansont]

Yes. It follows the same laws of physics. The details of the field geometry will be the only possible variable, but in any case it will comply with Maxwell's equations.

[rigadin]

Yes. It follows the same laws of physics. The details of the field geometry will be the only possible variable, but in any case it will comply with Maxwell's equations.

So if I got it right you mean that the only thing that is different is the shape of the magnetic field and everything else is the same? thanks!

[baxtonduglonn]

If you mean a permanent magnet then the field corresponds to a direct current, i.e. a static field, not a varying one as in the case of alternating current.

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I have been thinking (I think) since my last post. In the Faraday Motor, a wire carrying a direct current rotates around a permanent magnet. A coiled wire carrying a current resembles a permanent magnet. What form of magnet resembles a straight current carrying wire ? Can perpendicular magnetic fields induce any motion.

I'm not suggesting perpetual motion or free energy, just trying to get my head around an "unwound" magnet !

[swansont]

So if I got it right you mean that the only thing that is different is the shape of the magnetic field and everything else is the same? thanks!

 

Right. A probe of some sort is not going to know if the source of the field is a permanent magnet or a current in a wire — a moving charge is going to behave in accordance with F = qv X B. You might be able to deduce the source by looking at the whole "map" of the field.