The superconducting magnet for the experimental MRI studies at a laboratory is a 1m long solenoid of 60 cm diameter, producing a field of 5T. The current energizing the device is 250A.
a) how many turns of this 250A superconductor are in this magnet?
b) what is the inductance of the magnet?
c) how long will it take to "charge" the magnet to full field with a power supply providing 1V?