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

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) $0.40 \mathrm {~A}$