Solution to task 338 from Chertov´s for extramural stud

Solution to task 338 from Chertov´s for extramural stud

338. The field is formed by a point dipole with an electric moment p = 200 pC.m. Determine the potential difference U of two points of the field, located symmetrically relative to the dipole on its axis at a distance r = 40 cm from the center of the dipole.