Question: An air-filled toroidal solenoid has a mean radius of 15.5 cm and a cross-sectional area of 5.00 cm^2 When the current is 12.5A, the energy stored is 0.395J. How many turns does the winding have? The response must be typed, single spaced, must be in times new roman font (size 12) and must follow the APA format.