# Plotting electric field lines of a dipole

by silverfox
Tags: dipole, electric field lines, plot
 HW Helper P: 6,187 Welcome to PF, silverfox! I checked what the equation is for an electric dipole and found this: http://en.wikipedia.org/wiki/Dipole#...lectric_dipole If I work this out in polar coordinates, I get a slightly different formula than the one you have for what appears to be the magnitude of the electric field. (You can use that $\mathbf{p} = qd\cos\theta \mathbf{\hat r} - qd\sin\theta \hat{\textbf{θ}}$.) Can it be that you or someone else made a calculation mistake?