Correction exercice sur la loi d'ohm

<font inherit/inherit;;inherit;;transparent>Tension U aux bornes de la résistance</font>| \\ <font inherit/inherit;;inherit;;transparent>0V</font>| \\ <font inherit/inherit;;inherit;;transparent>3V</font>| \\ <font inherit/inherit;;inherit;;transparent>4,5V</font>| \\ <font inherit/inherit;;inherit;;transparent>6V</font>| \\ <font inherit/inherit;;inherit;;transparent>9V</font>|