A long straight wire (diameter = 2.0 mm) carries a current of 30 A. What is the magnitude of the magnetic field 2.5 mm from the axis of the wire?
A) 3.2 mT
B) 2.8 mT
C) 2.4 mT
D) 3.6 mT
E) 3.0 mT
Correct Answer:
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