Four point charges of equal magnitude are arranged at the corners of a square of

Question

Four point charges of equal magnitude are arranged at the corners of a square of side as shown in the figure below +9 +0 (a) Find the magnitude and direction of the force exerted on the charge in the lower left corner by the other three charges. (Assume the lower left corner is at the origin. Use the following as necessary: L, k, and q.) (b) Show that the electric field at the midpoint of one of the sides of the square is directed along that side toward the negative charge and has a magnitude given by the following equation. (Do this on paper. Your instructor may ask you to turn in this work.) eBook Interactive Example Submit Answer Save Progress

Explanation / Answer

F = F1+F2+F3

F = k ( -q^2/L^2-q^2/L^2+q^2/2L^2)

F = kq^2/L^2 (1/2-2)

F = kq^2/L^2(-3/4)

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