Submitted by Infferno122 t3_11o5rkm in askscience
luckyluke193 t1_jbuu6ht wrote
Reply to comment by ChemicalRain5513 in How do impurities affect superconductivity? by Infferno122
The superconducting coils that generate the magnetic fields for MRI and NMR spectroscopy systems have zero DC resistance.
They usually operate in persistent mode, meaning that there is no power supply attached to them. As long as you keep them superconducting, you can have hundreds of amps circulating in the coils without any change in the current over several years.
Viewing a single comment thread. View all comments