A bar magnet of magnetic m and moment of inertia I (about center , perpendicular to length ) is cut into two equal pieces, perpendicular to length . Let T be the period of oscillations of the original magnet about an axis . through the mid -point , perpendicular to length , in a magnetic field B. What would be the similar period $T^1$ for each piece?

Question

$\begin{array}{1 1} T \\ \large\frac{T}{2} \\ 2T \\ \large\frac{3T}{2} \end{array} $