Question 2.4. Four charges of equal magnitude are arranged at the corners of a square of side L as shown in the figure. a) Find the magnitude. and direction of the force exerted on the charge in the lower left corner by the other charges. [Ans: k (1-) (i + 3)] V2 b) Show that the electric field at the midpoint of one of the sides of the square is directed né that side toward the negative charge and has a magnitude E given by:

Question 2.4. Four charges of equal magnitude are arranged at the corners of a square of side L as shown in the figure. a) Find the magnitude. and direction of the force exerted on the charge in the lower left corner by the other charges. [Ans: k (1-) (i + 3)] V2 b) Show that the electric field at the midpoint of one of the sides of the square is directed né that side toward the negative charge and has a magnitude E given by: