A 100-M-Long Copper Wire with Cross-Sectional Area 1

A 10.0-m-long copper wire with cross-sectional area 1.25 × 10^-4 m² is bent into a square loop,and then connected to a 0.25-V battery.The loop is then placed in a uniform magnetic field of magnitude 0.19 T.What is the maximum torque that can act on this loop? The resistivity of copper is 1.70 × 10^-8 Ω·m.

A) 2.2E+2 N·m
B) 1.8E+2 N·m
C) 9.7E+2 N·m
D) 5.6E+2 N·m

Correct Answer:

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