A magnetic dipole is acted upon by two magnetic fields which are inclined to each other at an angle of $75^{\circ}$. One of the fields has a magnitude of $15\; mT$. The dipole attains stable equilibrium at an angle of $30^{\circ}$ with this field. The magnitude of the other field (in mT ) is close to :

Question

$\begin{array}{1 1}(1) 11 \\ (2) 36 \\ (3) 1 \\ (4) 1060 \end{array}$