1. The problem statement, all variables and given/known data What are the strength and direction of the electric field at the position indicated by the dot in the figure? 2. Relevant equations E_{dipole} = ~ [1/(4πε_{0})] * [2p/r^{3} ] on the axis of an electric dipole E_{dipole} = ~ [-1/(4πε_{0})] * [p/r^{3} ] in the plane perpendicular to an electric dipole 3. The attempt at a solution Which equation should I use?? Thanks
Neither. Your equations only apply if the two charges in the dipole are much closer together than the distance r from the dipole.
my textbook uses these forumulas...so i tried the problem using them so here is my process: p = qs s=0.1 q=1*10^{-9} p=1*10^{-10} 1/(4πε_{0}) = 9*10^{9} r=0.05m plugging everything into the second equation {[-1/(4πε_{0})] * [p/r3 ]}, i get -7200, but this is incorrect
good idea..this was my original approach, which didn't work for some reason E=[1/(4??_{0})]*[q/r^{2}] using the two charges: q_{1}=1*10^{9} q_{2}=-1*10^{9} and their respective distances: r_{1}=0.05 r_{2}=0.0125^{0.5} (square root) and doing all calculations, and then adding the two charges (3600 and -720) gives me 2880, which is incorrect...