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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