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Superconductors

Definition:

Superconductors are materials that, at very low temperatures, conduct electricity with no resistance.

This means that, unlike the more familiar conductors such as copper or steel, a superconductor can carry a current indefinitely without losing any energy in the form of heat, light, or sound.

Another important property is that no magnetic field can exist within a superconductor. This property has been exploited in the creation of maglev (for magnetic levitation) high-speed trains. This property is also used, paradoxically, in the creation of very strong magnets used in research and in medical applications such as magnetic resonance imaging (MRI).

Source: GrenFacts, based on Superconductor week Glossary  

Related words:

Magnetism

To read about this term in context:

GreenFacts Summary on Static Fields:

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