added resistor

05_courant_electrique.md

@@ -142,5 +142,8 @@ la fonction sera une droite de pente $1/R$.
 ---
 
 Les unités de la résistance sont les Ohm, 
-notés $\Omega$.
+notés $\Omega$. Dans un circuit électrique
+la résistance est représentée par le symbole de la @fig:resistor
+
+![Symbole de la résistance.](figs/resistor.svg){#fig:resistor width=50%}
 

figs/resistor.svg

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