Physics - Magnetism Question with Solution | TestHub

A magnetic needle of magnetic moment$6.7\times {10}^{-2}\mathrm{ }\mathrm{A} {\mathrm{m}}^2$and moment of inertia$7.5\times {10}^{-6} \mathrm{kg}\mathrm{ }{\mathrm{m}}^2$is performing simple harmonic oscillations in a magnetic field of$0.01 \mathrm{T}$. Time taken for$10$complete oscillations is: