We will determine the magnetic field as follows:
[tex]\begin{gathered} B=\frac{\mu_0I}{2r\pi} \\ \\ \Rightarrow B=\frac{(4\pi\ast10^{-7})(2.785)}{2\pi(0.21918\sqrt{2})}\Rightarrow B=1.796963578...\ast10^{-6} \\ \\ \Rightarrow B\approx1.8\ast10^{-6}T\Rightarrow B\approx1.8\mu T \end{gathered}[/tex]So, the magnitude of the magnetic field is approximately 1.8 micro tesla.
