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On branche un conducteur ohmique de résistance R = 10 homs aux bornes d'une pile G de
fem. E = 9,0 V et de résistance intérieure r = 2,0 N.
Un courant d'intensité I circule alors
dans le circuit.
a) Faire un schéma et préciser le sens du courant.
b) Calculer I.
c) On branche en dérivation aux bornes de R, un conducteur ohmique de résistance R2 = 30 N.
C.1) Calculer la nouvelle valeur l’ de l'intensité du courant dans le circuit.
0.2) Calculer les valeurs , I1 et I2 des intensités des courants traversant respectivement R1 et R₂
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On branche un conducteur ohmique de résistance R = 10 homs aux bornes d'une pile G de
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