12. An electrostatic field is created in a vacuum by two infinite parallel planes charged uniformly by the same name with a surface density of σ1 = 5 nC / m2 and σ2 = 2 nC / m2, respectively. Determine the strength of the electrostatic field: 1) between the planes; 2) outside the planes. Build a graph of tension along a line perpendicular to the planes.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)