The magnetic moment of a current carrying loop is $2.1\times {10}^{-25}{\mathrm{Am}}^2$.  The magnetic field at a point on its axis at a distance of $1\stackrel{\mathrm{o}}{\mathrm{A}}$ is

Field at a point x from the centre of a current carrying loop on the axis is

$\begin{array}{l}\mathrm{B}=\frac{{\mathrm{\mu }}_0}{4\mathrm{\pi }}.\frac{2\mathrm{M}}{{\mathrm{x}}^3}=\frac{{10}^{-7}\times 2\times 2.1\times {10}^{-25}}{{\left({10}^{-10}\right)}^3}\\ =4.2\times {10}^{-32}\times {10}^{30}=4.2\times {10}^{-2}\mathrm{Wb}/{\mathrm{m}}^2\end{array}$