Question

Two particles, carrying charges - q and +q and
having equal masses m each, are fixed at the ends
of a light rod of length a to form a dipole. The rod is
clamped at an end and is placed in a uniform
electric field E with the axis of the dipole along the
electric field. The rod is slightly tilted and then
released. Neglecting gravity find the time period of
small oscillations
​

Answer 1

hey please wait some minutes I'm gonna solving it my notebook

here I is moment of inertia