An MRI scanner uses a large solenoid with inductance 0.53 H, carrying 2.4 kA of current.
(a) What's the energy stored in the solenoid?
(b) The solenoid coils are normally superconducting (zero resistance), but if superconductivity fails they revert to a resistance of 0.31 mOhms.
(b) Given that the current can't change instantaneously, find the power dissipation in the solenoid immediately after a sudden loss of superconductivity.