Question

You have two cylindrical solenoids, one inside the other, with the two cylinders concentric. The outer solenoid has length â„“outer = 400 mm, radius Router = 50 mm, and Nouter = 2000 windings. The inner solenoid has length â„“inner = 40 mm, radius Rinner = 20 mm, and Ninner = 170 windings. The inner solenoid is centered within the outer solenoid.