In the given figure magnetic field at the center of ring $\mathrm{O}$ is $\frac{8}{\sqrt{2}} \mathrm{T}$. Now it is turned through $90°$ about $\mathrm{xx}\text{'}$ axis, so that two semicircular parts are mutually perpendicular. The new value of magnetic field (in Tesla) at centre is $\sqrt{n}$. Find $n$.