The Magnetic Field Due to the Current in a Long $8.0 \mu T$

question 73

Multiple Choice

The magnetic field due to the current in a long, straight wire is $8.0 \mu T$ at a distance of $4.0 \mathrm {~cm}$ from the center of the wire. What is the current in the wire? $\left( \mu _ { 0 } = 4 \pi \times 10 ^ { - 7 } \mathrm {~T} \cdot \mathrm { m } / \mathrm { A } \right)$

• A) \(0.20 \mathrm {~A}\)
• B) \(3.2 \mathrm {~A}\)
• C) \(1.6 \mathrm {~A}\)
• D) \(0.80 \mathrm {~A}\)
• E) \(0.40 \mathrm {~A}\)

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