31. The space between the plates of a flat capacitor is filled with paraffin. The distance between the plates is d = 0.5 cm. The potential difference U = 4 kV is applied to the plates of the capacitor. Find: a) the surface charge density σ on the plates σ; b) the surface density of bound charges on the dielectric σ ’.

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