FIGURE 21-2 -Four Point Charges of Equal Magnitudes but with Varying Signs

Multiple Choice

FIGURE 21-2
-Four point charges of equal magnitudes but with varying signs are arranged on three of the corners and at the center of the square of side d as shown in Fig. 21-2. Which of the arrows shown represents the net force acting on the center charge?

A) A
B) B
C) C
D) D
E) none of the above