A superconductor (with negligible ohmic resistance) has the shape of a uniform circular wave, i.e. the phases of the “wave” are semicircles. The amplitude is equal to the radius α of the circle and the length λ=4α. If the conductor is flowed by a direct current of intensity I, what is the wavelength Λ of the emitted electromagnetic wave?
A super conductor does not have negligible ohmic resistance - it has no ohmic resistance. Superconductivity is a quantum effect. I suspect you will find that constant supercurrents do not radiate whatever shape they follow.
No doubts, constant current do not radiate in the cases of any shape and any materials. My objection is to Dr. White.
High pinning superconductors have negligible resistance going down as exponent with decreasing of current, temperature and induction due to their inhomogeneity.
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