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Question 4 (CLO:5): The figure below shows a simplified generator arrangement. The stator consists of a constant magnetic field going from left to right. The rotor consists of a rectangular loop which has current flowing through it in the direction shown in the figure. The rectangular loop is split into 4 segments as shown in the figure. B a) Find the torque (magnitude and direction) for segment ab. Draw a diagram to showing the direction of each component. Clearly show all working b) Find the torque (magnitude and direction) for segment ed. Draw a diagram to showing the direction of each component. Clearly show all working. c) What is the torque in segments be and cd? Why? Page 8 of 1

d) What is the equation for the total torque on the rectangular loop? What is the direction of the torque? e) The length of the conductor l = 50 cm and the radius r = 10 cm. The magnetic field B = 10 T. Find the total torque. Prove that the equation derived in part d can also be written as: Tina = k(Bloop B) Recall that Bloop