A superconductivity is an event of precisely zero electrical resistance and discharge of magnetic fields occurring in fixed materials when cooled below a characteristic critical temperature. It is the disappearance of electrical resistance at low temperature. It is abnormally high electrical conductivity of certain substances.
Superconductivity is a quantum mechanical phenomenon. Most of the physical properties of superconductive vary from material to material, such as the heat capacity and chemical density at which superconductivity is destroyed. In the case of metals, it occurs at very low temperatures. Certain substances show it at temperatures approaching absolute zero.
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