A circular wire loop of area 018m squared carries a current, Ask an Expert

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A circular wire loop of area 0.18m squared carries a current of 4 A. the coil lies in a horizontal plane with the current flowing in the counterclockwise direction when viewed from above. At this point the earth’s magnetic field is 1.2x10^-4 T directed 60 degrees below the horizontal. What is the magnitude of the torque which acts on the loop?

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