3.- Four point charges are placed at the vertices of a square with a side of 12 cm. If q₁ = 8.2 x 10-6 C, q2 = 4.6 x 10-6 C, q3 = 6.4 x 10-6 C, q4 = 14.6 x 10-6 C. Calculate the electric field at the center of the square. 9. 92 ☑ 93 -94
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