q1 = - 3.0 × 10-9 C
q2 = 4.0 × 10-9 C
r1 = (y2 + (9cm)2)0.5
r2 = (y2 + (15cm)2)0.5
At the given point on the y-axis, the net potential is zero.
A -3.0 nC charge is on the x-axis at x = -9 cm and a +4.0 nC charge is on the x-axis at x = 15 cm. At what point or points on the y-axis is the electric potential zero?
y = _____ cm
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