10. The electric field in kerosene, formed by a point charge of 10 ∙ 10−10 C, at a certain distance from it is 5 N / C. Determine the distance from the charge to a given point in the field and the force which then acts on a charge of 3 ∙ 10−6 C placed at this point in the field.

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