19. Determine the electric field created at point M by charges q1 = 2 ∙ 10−12 C and q2 = 4 ∙ 10−12 C. The distance between charges is l = 5 cm. The distances from point M to charges q1 and q2 are, respectively, r1 = 4 cm and r2 = 3 cm.

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