A single charge potential plot
H.Tahsiri
V[z_,x_]=1/Sqrt[y^2+z^2+x^2]/.y->.01 1 ---------------------- 2 2 Sqrt[0.0001 + x + z ]
ContourPlot[V[z,x], {x, -1, 1}, {z, -1, 1},ContourShading->False,Contours->15,ContourSmoothing->True,PlotPoints->100,AspectRatio->Automatic];
DensityPlot[V[z,x], {x, -1, 1}, {z, -1, 1},PlotPoints->50];
Clear[V,x,z,y]
V[z_,x_,y_]=1/Sqrt[y^2+z^2+x^2]
Plot3D[V[x,z ,.01], {x,-1,1}, {z,-1,1},PlotPoints->30,PlotRange->All,Boxed->False];