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A Coil of 1000 Turns of Wire Has a Radius

Question 41

Multiple Choice

A coil of 1000 turns of wire has a radius of 12 cm and carries a counterclockwise current of 15A.If it is lying flat on the ground, and the Earth's magnetic field points due north, has a magnitude of 5.8 x 10-5 T, and makes a downward angle of 25° with the vertical, what is the torque on the loop?


A) 1.7 x 10-2 N·m west
B) 3.6 x 10-2 N·m west
C) 1.7 x 10-2 N·m east
D) 3.6 x 10-2 N·m east
E) 3.6 x 10-2 N·m south

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