Mathematics

Problem

A magnetic field of

1.0 \times 10^{-4}\,\text{T}

is measured at a point

5.0\,\text{cm}

from a very long straight wire. Determine the current in the wire. (

\mu_0 = 4\pi \times 10^{-7}\,\text{T m A}^{-1}

) a)

12.5\,\text{A}

25\,\text{A}

2.5\,\text{A}

50\,\text{A}