One half of the thin rod was charged with a positive charge with a linear density of 10 nC / m, and the other with a negative charge with the same linear density. Determine the potential of the electric field at a point located on the extension of the axis of the rod at a distance equal to half its length from the end of the rod.

A detailed solution with a brief description of the condition, formulas and laws used in the solution, the derivation of the formula and the answer.
If you have any questions about the solution, write. I try to help.