ElectrostaticsHard
Question
A point particle of mass M is attached to one end of a massless rigid non-conducting rod of length L. Another point particle of same mass is attached to the other end of the rod. The two particles carry charges +q and & q repectively. This arrangement is held in a region of uniform electric field E such that the rod makes a small angle θ (< 5o) with the field direction. The minimum time needed for the rod to become parallel to the field after it is set free. (rod rotates about centre of mass)
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