Let us suppose that there is a superconducting toroid. Let us also suppose that there is a finite electric current flowing in it. We imagine the temperature of the toroid to be below the critical temperature. Now if we try to raise the temperature of the toroid then due to the law of conservation of energy (or lenz’s law) the magnetic field which is due to the circulating current would resist to being ‘changed’ easily. This would lead to the circulating current trying to remain ‘unchanged’ which would only be possible if the temperature of the superconductor is prevented from going above the critical temperature. So there might arise two possibilities (according to my understanding) 1) There would exist some kind of a thermal inertia in this case which would result in the specific heat capacity of the superconductor being bumped up at the interval T(0-)->T(0+) [T being the critical temperature of the super conductor] 2) The critical temperature of a current carrying superconductor is ‘raised’ while a transition from ‘below critical’ temperature to ‘above critical’ temperature is tried. Does any of these things actually happen? I am curious.