The flux linked to the ring can not change on transition to the superconduction state, for reasons, similar to that given above. Thus a current `I` must be induced in the ring. Where,
`I = (Phi)/(L) = (pi a^(2) B)/(mu_(0) a(In (8a)/(b) - 2)) = (pi a B)/(mu_(0) (In (8a)/(b) - 2))`