A -11.8nC point charge and a +23.9nC point charge are 13.8cm apart on the x-axis

[nc9261]

Homework Statement

What is the magnitude of the electric field at the two points on the x-axis where the electric potential is zero?

Homework Equations

E= kQ/r^2

The Attempt at a Solution

I tried setting three cases, between the charges, to the right of the positive charge, and to the left of the negative charge. Assuming the negative charge is placed on x-axis at x=0.

 

[mfb]

That's a good start. What did you get?

 

[gneill]

Homework Statement

What is the magnitude of the electric field at the two points on the x-axis where the electric potential is zero?

Homework Equations

E= kQ/r^2

The Attempt at a Solution

I tried setting three cases, between the charges, to the right of the positive charge, and to the left of the negative charge. Assuming the negative charge is placed on x-axis at x=0.

Okay, so let's see your attempts. What did you find and how?