5G10.20 - Breaking a Magnet
Breaking a magnet
Overview Breaking a magnet apart creates another magnet with two opposite poles.
1. Show the magnetic poles of the magnet by moving the magnet close to the table compass and observing its reaction to the magnet ( i.e. the south pole of the magenet attracting the north (red) pole of the compass).
2. “Break” off one of the magnet bars and demonstrate it now has two poles as did the larger magnet had.
This demo shows the magnetic properties of a "broken" magnet. When there is charge separation in a material in electrostatics, and that material is "broken" it produces charged parts. By contrast in magnetism, the broken pieces continue to have poles. The opposite poles can be shown by bringing the magnet near the compass, and showing how the alternating ends attract and repel different parts of the compass.