An air-filled toroidal solenoid has 300 turns of wire, a mean radius of15.0 , and a cross-sectional area of 4.80 .
a) If the current is 5.90 , 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.