MCQ
A current carrying coil is placed with its axis perpendicular to $N-S$ direction. Let horizontal component of earth's magnetic field be $\mathrm{H}_{\mathrm{o}}$ and magnetic field inside the loop is $H.$ If a magnet is suspended inside the loop, it makes angle $\theta$ with $H .$ Then $\theta=$
- A$\tan ^{-1}\left(\frac{\mathrm{H}_{\mathrm{o}}}{\mathrm{H}}\right)$
- ✓$\tan ^{-1}\left(\frac{\mathrm{H}}{\mathrm{H}_0}\right)$
- C$\operatorname{cosec}^{-1}\left(\frac{\mathrm{H}}{\mathrm{H}_0}\right)$
- D$\cot ^{-1}\left(\frac{\mathrm{H}_0}{\mathrm{H}}\right)$