Physics

Problem

A long straight wire carries a current of

15\,\text{A}

. Calculate the magnitude of the magnetic field at a point

4\,\text{cm}

from the wire in vacuum. a)

1.5\times10^{-4}\,\text{T}

3.75\times10^{-5}\,\text{T}

7.5\times10^{-5}\,\text{T}

7.5\times10^{-6}\,\text{T}