Superconductivity Electricity is best defined as the flow of electrons in a conductor. Superconductivity is a phenomenon in which certain metals, alloys, and ceramics conduct electricity without resistance. Superconductivity occurs in metals and alloys such as lead, mercury, and tin, at temperatures near absolute zero. In 1911, Heike Kamerlingh Onnes discovered superconductivity while researching the effects of extremely cold temperatures on different metals. Onnes discovered that

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