Note that positive charges field is smaller than that of the negative s due to different distances. Also if Q is positive, F s direction is the same as E s. Work done on a charge by the electric field is path independent . This means that as long as you start at A end up at B, you can take any path between A and B, you will get the same value for work done. Because When a charge is moved a distance d through a uniform electric field E, the work done on the charge by the field is work along AC is zero since force is perpendicular to path.
Electric potential is a scalar quantity.
A negative charges electric potential will be negative. Potential doesn t depend on the direction. Potentials at points that are at equidistance from the charge all have the same potential value. The union of points that have the same potential is called equipotential surface or line. For example, for a point like charge, equipotential surfaces are concentric spheres centered on the charge.