A magnetic field is a field force that describes the magnetic influence of moving electrically charged particles and magnetic materials.
An electrically charged particle or magnetic material will feel an influence by a magnetic field such as a mass feels the influence of a gravitational field.
A.1 A magnetic field is a vector field that describes the magnetic force exerted on moving electric charges, electric currents, or magnetic materials.
Magnetic fields can be produced by magnetic dipoles or combinations of dipoles, but never by single poles.
Magnetic dipoles have north and south polarity.
12.1.A.2 A magnetic field is a vector quantity and can be represented in space using vector field maps.
Magnetic field lines form closed loops.
Magnetic fields in a bar magnet form closed loops with the external magnetic field pointing away from one end of the bar magnet defined as the north pole and towards the other end defined as the south pole.
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