Electric Potential Video Lessons

Concept

# Problem: 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

###### FREE Expert Solution

Potential, V,

$\overline{){\mathbf{V}}{\mathbf{=}}\frac{\mathbf{k}\mathbf{q}}{\mathbf{r}}}$

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.

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###### Problem Details

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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