The distribution function is determined numerically for electrons subject to magnetic trapping, electron‐electron, and electron‐ion collisions, and an electric field large enough to invalidate the Spitzer–Ha¨rm (classical) approximation. The electrical resistivity is determined. It is compared with analytical theory for tokamaks, in the limit of large inverse aspect ratio &egr;, and small drift velocityVd/Vth. The resistivity is plotted for values of &egr; andVd/Vthfor which no analytic theory is available.