A Conducting Rod with a Square Cross Section (3 $\oint \mathrm { B } \cdot d \mathbf { s }$

question 133

Multiple Choice

A conducting rod with a square cross section (3.0 cm *3.0 cm) carries a current of 60 A that is uniformly distributed across the cross section.What is the magnitude of the (line) integral $\oint \mathrm { B } \cdot d \mathbf { s }$ around a square path (1.5 cm *1.5 cm) if the path is centered on the center of the rod and lies in a plane perpendicular to the axis of the rod?

• A)14 \(\mu\)T.m
• B)75 \(\mu\)T. m
• C)19 \(\mu\)T .m
• D)57 \(\mu\)T . m
• E)38 \(\mu\)T.m

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