Two positive point charges each of magnitude `10 C` are fixed at positions `A` &`B` at a seperation `2d= 6m`. A negatively charged particle of mass `m= 90gm` and charge of magnitude `10xx10^(-6)C` is revolving in a circular path of radius `4m` in the plane perpendicular to the line `AB` and bisecting the line `AB`. Neglect the effect of gravity. Find the angular velocity of the particle