An air-filled toroidal solenoid has 370 turns of wire, a mean radius of 15.0 cm , and a cross-sectional area of 4.30 cm2
a) If the current is 5.90 A, calculate the magnetic field in the solenoid
b) Calculate the self-inductance of the solenoid.
c) Calculate the energy stored in the magnetic field.
d) Calculate the energy density in the magnetic field.
e) Find the answer for part D by dividing your answer to partC by the volume of the solenoid.