Solved cryptogram
A superconductor carries current with no resistance, so a loop of it can circulate for years.
Physics Facts, sourced to HyperPhysics, Georgia State University.
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What it means
Not very small resistance. Zero, as far as any experiment has been able to establish, below a temperature that depends on the material. A current started in a closed superconducting ring has been watched for years without measurable decay. That is what makes the magnets in an MRI scanner and in a particle accelerator possible: once the field is established the power supply can be disconnected, and the current keeps going around.
The claim comes from HyperPhysics, Georgia State University.
- SourceHyperPhysics, Georgia State University
- CollectionPhysics Facts
- Difficultymedium
- Length76 letters, 17 unique
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