Homework Statement
Point charges of -7 µC, 1.0 µC, and +7 µC are located along the x-axis at x = -1.0 cm, x = 0, and x = +1.0 cm, respectively. Locate a point on the positive x-axis where the magnitude of the electric field is zero.
Homework Equations
E=(kQ)/r^2
E(total)=E(1)+E(2)+E(3)...