A Very Long Thin Wire Produces a Magnetic Field of 0.0050

question 42

Multiple Choice

A very long thin wire produces a magnetic field of 0.0050 × 10^-4 T at a distance of 3.0 mm. from the central axis of the wire. What is the magnitude of the current in the wire? (μ0 = 4π × 10^-7 T ∙ m/A)

• A) 7.5 mA
• B) 1.7 mA
• C) 3300 mA
• D) 24,000 mA

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