Torque: A flat circular coil has 200 identical loops of very thin wire. Each loop has an area of 0.12 m2 and carries 0.50 A of current. This coil is placed in a magnetic field of 0.050 T oriented at 30° to the plane of the loop. What is the magnitude of the magnetic torque on the coil?
A. 0.25 N ? m
B. 0.52 N ? m
C. 2.5 N ? m
D. 5.2 N ? m
Answer: B
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