A toroid having a square cross section, 1.00 cm on a side, and an inner radius of 17.0 cm has 550 turns and carries a current of 0.500 A. (It is made up of a square solenoid bent into a doughnut shape.)
a) What is the magnitude of the magnetic field inside the toroid at the inner radius?
b) What is the magnitude of the magnetic field inside the toroid at the outer radius?