1) Six-point charges are kept at the vertices of a regular hexagon of side L and centre O as shown in the figure. Given that K = 14πϵ0qL2, which of the following statements(s) is(are) correct. A) The electric field at 0 is 6K along OD B) The potential at O is zero C) The potential at all points on the line PR is same D) The potential ar all points on the line ST is same Answer: Option A,B,CExplanation: Resultant of 2K and 2K (at 1200C) is also 2K towards 4K. Therefore , net electric field is 6K (b) V0=14πϵ0 =14πϵ0L(qA+.....+qE) =0 Because qA+qB+qC+qD+qE+qF=0 (c) only line PR , potential is same (=0)