Questions tagged [thought-experiment]

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Can a 'superconductor battery' , theoretically at least, last forever? Even if it is being used? [closed]

One of the amazing 'killer apps' of a cheap, non-toxic, high-temperature superconductor is storing electrical energy in a large current that loops around indefinitely. If this could be scaled down, it ...
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Measuring length of two wires inside copper with a TDR

I have a cable as in the drawing. The black parts are insulators and the brown parts are copper, so there is a big copper cable and inside are two smaller copper cables. When the big copper cable is ...