A regular hexagon of side 0.50 m has identical point charges +2.0 μC placed at five of its vertices, leaving the sixth vertex unoccupied. Take the centre of the hexagon as O.
(i) Calculate the magnitude of the electric field at O produced by this arrangement. (Use k=9.0×109Nm2C−2.)
(ii) Specify the direction of the resultant field with respect to the hexagon.