1 d d nd ed (7%) Problem 11: A solenoid is created by wrapping a L = 65 m long wire around a hollow tube of diameter D=4.5 cm. The wire diameter is d=0.55 mm. The solenoid wire is then connected to a power supply so that a current of I= 7.5 A flows through the wire. Randomized Variables L= 65 m D=4.5 cm d=0.55mm I=7.5 A & 20 % Part (a) Write an expression for the number of turns, N, in the solenoid. You do not need to take into account the diameter of the wire in this calculation. N= a 0 D Hints: deduction per hint. Hints remaining m Submit B a B k P Hint A d h L 1 7 8 9 45 6 23 1 0 . I give up! Feedback: 15 dedection per feedback Grade Summary Deductions Potential 05 100% Submissions Attempts remaining per attempt) detailed view 20% Part (b) Calculate the number of turns, N, in the solenoid. & 20% Part (e) Write an expression for the length of the solenoid (2) in terms of the diameter of the hollow tube D, the length of the wire L and the diameter of the wire d. Assume it is constructed by using only 1 layer of loops (note that most solenoids are actually constructed with many layers, to maximize the magnetic field density). 20% Part (d) Calculate the length of the solenoid (L) in meters. & 20% Part (e) Calculate the magnitude of the magnetic field at the center of the solenoid in testa.