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All permanent magnets have two poles.

A permanent magnet may have a complicated geometry, but even then the magnetic poles always reduce to the category of north pole or south pole.

We say that magnetic field lines start at a north pole and end at a south pole. (In reality, the lines go through the magnet and connect inside so there really is never an end to a magnetic field line.)

Electromagnets do not have a pole in the same sense as a permanent magnet, so there is no place on an electromagnet for a field line to start or stop. That is fine, of course, since it is really having field line starting or stopping which is not allowed by the laws of physics.

The fundamental laws of magnetism do not permit the possibility of a single pole on a magnet or atom or particle of any sort. Such a thing has a name. It is called a magnetic monopole. There have been extensive searchers for such an entity, but none have been found. We do not have a guarantee that none exist however. Of course, if one were found it would require that we alter the equations that now constitute the basic laws of electromagnetic theory.
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11y ago
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13y ago

"Charge" is a concept that is related to electrical forces, not to magnetic forces. The electrical charge on a magnet would usually be zero (or so small that it is insignificant).

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10y ago

no

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Q: Does a magnet always have 2 poles?
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