Physics - Magnetism Question with Solution | TestHub

A moving coil galvanometer has a coil with$175$turns and area$1\mathrm{ }\mathrm{c}{\mathrm{m}}^2.$It uses a torsion band of torsion constant${10}^{-6} \mathrm{N} \mathrm{m}/\mathrm{r}\mathrm{a}\mathrm{d}$The coil is placed in a magnetic field B parallel to its plane. The coil deflects by$1^{\mathrm{o}}$for a current of$1 \mathrm{m}\mathrm{A}$The value of B (in tesla) is approximately: