Physics - SHM Question with Solution | TestHub

A magnetic needle of magnetic moment $7.5\times 10^{-2}{\mathrm{Am}}^2$ and moment of inertia $7.5\times 10^{-6}\mathrm{kg}{\mathrm{m}}^2$ is performing simple harmonic oscillations in a magnetic field of 0.1 T . Time taken for 10 complete oscillations is (Take ${\pi }^2=10$ ) :