Solution to task 334 from Chertov´s for extramural stud

Solution to task 334 from Chertov´s for extramural stud

334. Two parallel charged planes, surface charge densities of which σ1 = 2 µC / m2 and σ2 = -0.8 µC / m2, are at a distance of d = 0.6 cm from each other. Determine the potential difference U between the planes.