A thin uniform rod of mass M and length 2L is hinged at its centre O so that it can rotate freely in horizontal plane about the vertical axis through O. at its ends the insulating rod has two point charges 2q and q (see figure). An electrif field E is switched on making and angle `theta_(0)=60^(@)`
with the initial position of the rod. The field is uniform and horizontal. (a) Calculate the maximum angular velocity of the rod during subsequent motion. (b) Find the maximum angular acceleration of the rod.

Answer

(a). `sqrt((3qR)/(ML))`
(b). `(3sqrt(3))/(2)(qE)/(ML^(2))`