Home » English riddles » General Subjects » Electrical riddle no.32 – Super conductor cable » Reply To: Electrical riddle no.32 – Super conductor cable Reply To: Electrical riddle no.32 – Super conductor cable 2021-08-03 at 11:08 am #1495 Hamid I think the current flow of a dc superconductor coil is limited by internal resistance of power supply circuit .