What is superconductivity?
Quick Answer
Superconductivity is a state in which a material conducts electricity with zero electrical resistance below a critical temperature. Some superconductors also expel magnetic fields.
The Full Story
Superconductivity was first discovered in 1911 by Heike Kamerlingh Onnes. When certain materials are cooled below a critical temperature, electrical resistance can drop to zero, allowing current to flow without energy loss. Many superconductors also show the Meissner effect, expelling magnetic fields from their interior. Superconductivity is used in MRI machines, particle accelerators, and maglev-related technologies, and it remains an active research area in physics.
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"The bizarre state where electricity can flow forever"
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