Persistent current is the current which flows forever in a superconductor.
In picture we have two conductors. In figure "A" we have a round superconductor and when we give voltage to it and then disconnect the voltage, current will flow round and round forever and it makes sense.
But in figure "B" we have a straight conductor and when we give voltage to it and then disconnect the voltage, current is also supposed to flow forever.
But my confusion is that how the current will flow in that straight conductor as it is an open terminal on both terminals so how the current will flow in it ? Ofcourse none of the terminals of the straight conductor have the path for the current to flow. So how current will behave in that open ended straight conductor.
