# Electric Potential From Electric Field

1. Oct 1, 2009

### doubedylan

1. The problem statement, all variables and given/known data
Two particles, of charges q1 and q2 are separated by distance d. The net electric field due to the particles is zero @ x=d/4.
With V=0 @ infinity, locate (in terms of d) any point on the x axis (other than infinity) at which the electric potential due to the two particles is zero.

2. Relevant equations
V=-$$\int$$$$^{f}_{i}$$ ($$\vec{E}$$ $$\bullet$$ d$$\vec{s}$$)

3. The attempt at a solution
Seems too obvious to be true, but I think V = 0 @ d/4 since E=0 as well.
Anyone see where else is could be?

2. Oct 1, 2009

### w3390

Pretend like the two particles are equidistant from the origin, therefore the origin is the middle of the two charges. When finding potential at a point, it is the potential of one charge on the point plus the potential of the other charge on the point. Potential is not a vector, so I believe if the charges are the same, you will find your answer in the middle of the two charges.