37. A paraffin plate is clamped between the plates of a flat capacitor (ε = 2). The area of the plates is S = 200 cm2. Determine the surface density σ 'of bound charges on paraffin if the capacitor plates are attracted to each other with a force of F = 7 mN.

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