Ohm's Law is not relevant for superconductors and is not fundamental. Ohm's Law is a simple phenomenological relationship that is a useful approximation for man

Ohm's Law is not relevant for superconductors and is not fundamental. Ohm's Law is a simple phenomenological relationship that is a useful approximation for many everyday situations where V/I is approximately constant. cf https://en.wikipedia.org/wiki/Friction https://en.wikipedia.org/wiki/Friction and https://en.wikipedia.org/wiki/Hooke's_law https://en.wikipedia.org/wiki/Hooke's_law