A conducting rod with a square cross section (3 cm x 3 cm) carries a current of 60 A that is uniformly distributed cross the cross section.
What is the magnitude of the (line) integral B. ds around a square path (1.5 cm x 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?
The answer is 19 uT x m
Please show the work