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- Unlike the single point charge, magnets
- always contain both a positive and a negative
- charge. Magnets are therefore dipolar;
- magnetic monopoles do not exist. Magnets
- are one source of magnetic fields. Materials
- can be classified according the amount of
- naturally occurring magnetic field that is
- present within the material. Diamagnetic
- materials do not possess a naturally occurring
- magnetic field and do not become magnetized.
- Paramagnetic materials possess a small
- magnetic field and the magnetic fields of the
- atoms may be somewhat aligned under specific
- circumstances.
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