If you start a current flowing in a superconducting wire that is kept cold, and then remove the power source, the
A) current would stop flowing immediately.
B) current would continue to flow.
C) current would flow through the superconducting wire for about twice as long as it would have through copper wire.
D) electrons would move through the wire, losing a great deal of energy.
E) superconducting wire would not be able to generate a magnetic field.

Question

Quizplus · Accepted Answer

In a superconducting wire, once a current is started, it will continue to flow indefinitely even if the power source is removed because there is zero resistance to impede the flow. This is known as persistent current. However, any external magnetic field can cause the current to decay over time.

If You Start a Current Flowing in a Superconducting Wire