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Two equal positive charges of magnitude q1 = q2 = 2 nC are on the y axis at y1 = +3 cm and y2 = -3 cm.
a) What is the magnitude and direction of the electric field on the x axis at x = 3 cm? ??? N/C + ??? N/C
b) What is the force exerted on a third charge q0 = 5 nC when it is placed on the xaxis at x = 3 cm? ??? N/C + ??? N/C
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