Electric Conductor

Superconductors carry electric current without any resistance, therefore without energy loss. In addition, under the extremely high currents they are able to carry, superconductors exhibit several characteristics that are unknown in common conductors. For instance, they may repel external magnetic fields; magnets placed over superconducting materials will remain suspended in the air. While there is a great potential in using superconductors as carriers of electrical energy, and for frictionless means of transportation, currently their use is limited. One of the reasons is their relatively low operating temperature; mostly close to the absolute zero, some higher, up to 130K (-225°F [-143°C]).