The magnetic field due to the current in a long,straight wire is 8.0 μT at a distance of 4.0 cm from the center of the wire.What is the current in the wire? (μ₀ = 4π × 10^-7 T ∙ m/A) A)0.20 A B)0.40 A C)0.80 A D)3.2 A E)1.6 A

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The magnetic field B around a long straight wire is given by B = (μ₀I)/(2πr). Solving for I gives I = (B * 2πr)/μ₀. Substituting B = 8.0 μT = 8.0 × 10⁻⁶ T, r = 0.04 m, and μ₀ = 4π × 10⁻⁷ T ∙ m/A, we find I = 1.6 A.

The Magnetic Field Due to the Current in a Long,straight