At what distance from the central axis of a long straight thin wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of about 5.0 x 10-7 T (μθ = 4π 10-7 T•m/A)
A) 1.0 m
B) 2.0 m
C) 4.0 m
D) 5.0 m
E) 3.0 m
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