3 ms·

Also energy storage: https://en.wikipedia.org/wiki/Superconducting_magnetic_energy_storage https://en.wikipedia.org/wiki/Superconducting_magnetic_energ...

• dgoldstein0 3y ago
  Neat, I hadn't heard of it, but totally makes sense
  • jacquesm 3y ago
    That's how superconductivity was demonstrated in the early days: a current in a loop that didn't decay.