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The magnetic field of a bar magnet
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The needle of a plotting compass lines up with the magnetic field of a magnet.
A magnetic field line can be followed from the north–seeking pole to the south–seeking pole of a magnet.
Arrows on magnetic field lines show the direction in which the north–seeking pole of another magnet would be forced.
The magnetic field of a bar magnet is symmetrical.
Magnetic field lines do not cross over and are continuous.