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 × 10-5 T? (?0 = 4? × 10-7 T ? m/A)
A) 5.0 cm B) 4.0 cm C) 2.0 cm D) 3.0 cm E) 1.0 cm


C

Physics & Space Science

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