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%%
%% Ein Beispiel der DANTE-Edition
%%
%%
%% Copyright (C) 2010 Herbert Voss
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%
%%
%% ====
% Show page(s) 1
%%
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{190.324pt}
\setlength\parindent{0pt}
\StartShownPreambleCommands
\usepackage{pst-electricfield}
\StopShownPreambleCommands
\begin{document}
\begin{pspicture*}(-10,-5)(6,5)
\psgrid[subgriddiv=0,gridcolor=lightgray,griddots=10]
\psElectricfield[Q={[600 -60 0 false][-4 0 0] },N=50,points=500,runit=0.8]
\psEquipotential[Q={[600 -60 0 false][-4 0 0]},linecolor=blue,Vmax=100,
Vmin=50,stepV=2](-10,-5)(6,5)
\psframe*(-10,-5)(-9.5,5)
\rput(0,0){\textcolor{white}{\large$-$}}
\multido{\rA=4.75+-0.5}{20}{\rput(-9.75,\rA){\textcolor{white}{\large$+$}}}
\end{pspicture*}
\end{document}
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