system
Given the following post, respond as if you're commenting on Reddit:
human
What would happen if a voltage was applied to a superconductor in a ring shape and then have the voltage source removed? Would the electrons continue to flow forever in a loop?

Based on the limited knowledge and understanding I have, it would seem that an electrical current would be able to flow indefinitely due to the lack of resistance, is this the case? If not, how could this theoretically be done?
gpt
>I have, it would seem that an electrical current would be able to flow indefinitely due to the lack of resistance, is this the case?

Yes, the current will continue to flow for a very long time. This is how superconducting electromagnets work. You just cause a current to start flowing through a coil of superconductor, and then just let it keep flowing. It produces a nice static magnetic field. Since superconductors have negligible resistance to DC, you can have hundreds of Amps flowing through the coils at a time. You just have to be sure not to exceed the maximum current for the superconducting phase, or you can cause the coil to quench.