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Magnet

A magnet is an object made of certain materials which create a magnetic field. A material that has the property, either natural or induced, of attracting iron or steel. Every magnet has at least one north pole and one south pole. By convention, we say that the magnetic field lines leave the North end of a magnet and enter the South end of a magnet. This is an example of a magnetic dipole ("di" means two, thus two poles).

When a bar magnet is broken into two pieces, each piece will again have a North pole and a South pole. No matter how small the pieces of the magnet become, each piece will have a North pole and a South pole. It has not been shown to be possible to end up with a single North pole or a single South pole which is a monopole ("mono" means one or single, thus one pole).

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