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## Homework Statement

Two point charges are placed on a horizontal line, the first is +3.0-μC located at x = 0.0-m, y = 0.0-m and the second is -4.0-μC located at x = 2.0-m, y = 0.0-m. At what points on the horizontal line y = 0.0 will the electric potential be zero?

## Homework Equations

V(r)=kq/r

## The Attempt at a Solution

V(total)=kq1/r1+kq2/r2=0

k(q1/r1+q2/r2)=0

k(3e-6/x-4e-6/(2-x)=0

x=6/7

So there should be no electric potential at x=6/7metres. Is that the only point?

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