aA point particle of mass Mattached to one end of a masslessrigid non- conducting rod of length L. Another pointparticle of the same mass is attached to the other end of therod. The two particles carry charges +q and -9respectively. This arrangement is held in a region ofuniform electric field E such that the rod makes a smallangle 0 (say of about 5 degrees) with the field direction.Find an expression for the minimum time needed for the rodto become parallel to the field after it is set free.-qᎾ+ q-E

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