A square loop (L = 0.20 m) consists of 50 closely wrapped turns, each carrying a current of 0.50 A. The loop is oriented as shown in a uniform magnetic field of 0.40 T directed in the positive y direction. What is the magnitude of the torque on the loop?
A. 0.21 N ? m
B. 0.20 N ? m
C. 0.35 N ? m
D. 0.12 N ? m
E. 1.73 N ? m
Answer: C
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