A Very Long Thin Wire Produces a Magnetic Field Of 0.0020

question 148

Multiple Choice

A very long thin wire produces a magnetic field of $0.0020 \times 10^{ - 4} \mathrm {~T}$ at a distance of $1.0 \mathrm {~mm}$ from the wire. What is the magnitude of the current?
(μ₀ = 4π × 10^-7 T ∙ m/A)

• A) 1.0 mA
• B) 2.0 mA
• C) 4000 mA
• D) 3100 mA

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