2. In the figure, four particles form a square with side a = 3 cm and have charges q1 = +5 nC, q2 = - 10 nC, q3 = + 10 nC and q4 = - 5 nC. (InC = 10 ° C) Determine the magnitude and direction of the resultant force acting on q2. First you must make the corresponding force diagram.
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