A torpid having a square cross section, 7.00 cm on a side, and an inner radius of13.0 centimeter has 550 turns and carries a current of 0.650 Amp. (It is made up of a square solenoid bent into a doughnut shape.)
(a) Find the magnitude of the magnetic field inside the torpid at the inner radius?
T
(b) Find the magnitude of the magnetic field inside the torpid at the outer radius?
T