Re:Superconductivity near room temperature
by TallGuyShort on Friday May 24, 2019 @03:12PM
(#20004466)
5% loss isn't that bad, but that's because they're being limited in a lot of ways to keep the efficiency high. Dropping current and increasing voltage, for instance. If you had a 100% efficient conductor, you could do things like transmit monstrously high levels of current without having to worry about stuff like that.
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True, although the superconducting effect is lost under high electric fields.
A superconducor rejects magnetic fields (a bit like a Faraday cage). What if you cranck it up high enough and force the superconductor in place? You lose superconductivity.
For that reason, there is actually a limit to thew current that can be transmitted, though it is much higher than with conventional cables (you still can't power a city with a hair-thin cable, IIRC).