A long, straight wire (radius = 2.0 mm) carries a current of 2.0 A distributed uniformly over a cross section perpendicular to the axis of the wire. What is the magnitude of the magnetic field at a distance of 1.0 mm from the axis of the wire?
A. 0.40 mT
B. 0.80 mT
C. 0.10 mT
D. 0.20 mT
E. 0.75 mT
Answer: C
Physics & Space Science
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