The magnitude of the magnetic field that a long and extremely thin current-carrying wire produces at a distance of 3.0 µm from the center of the wire is 2.0 × 10-3 T. How much current is flowing through the wire? (?0 = 4? × 10-7 T ? m/

A)
A) 30 mA
B) 190 mA
C) 19 mA
D) 380 mA


A

Physics & Space Science

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