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'''Magnetic fields''', resulting from the flow of [[electron]]s in [[metal]], impose an action-at-a-distance force on other [[charged particle]]s nearby.  This means that charged metals respond to magnetic fields by changing direction, or becoming attracted to or repelled from the field.

A '''magnetic field''' is a [[vector]] field responsible for generating forces on electrically charged objects and magnets.  Magnetic fields are generated by magnetic [[dipole]]s, moving [[electric charge]]s, or changing [[electric field]]s.

Magnetic fields are linked to electric fields; [[light]], for instance, is a propagating electric and magnetic [[wave]]. Relativistically, a magnetic force in one [[inertial frame]] corresponds to an electric force in another.

Magnetic fields, also known as '''B-fields''', are [[force field]]s that can be explained by [[relativistic]] effects of [[electric current]]s. Magnetic fields only exert a force on moving [[charge]]s. According to the "[[right hand rule]]," using your right hand to indicate the direction of current, the curl of the remaining fingers indicates the magnetic field, which is always perpendicular to the current, and running in the indicated.

 

When trying to determine the magnetic forces and fields, the [[right hand rule]] often proves useful.

==Earth's Magnetic Field==

==Earth's Magnetic Field==