DIPOLES_LINEAIRES - E1 TD N 8 DLECTROCINTIQUE PCSI 2009...

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TD N°8 D’ÉLECTROCINÉTIQUE : DIPÔLES LINÉAIRES Page 1 sur 4 E 1 DIPÔLES LINÉAIRES B A Quelle est la résistance équivalente au montage suivant vu de A et B, chaque résistance ayant la valeur de 2 Ω . PCSI TD N ° 8 D’ÉLECTROCINÉTIQUE EXERCICE N ° 1 On considère le circuit suivant : E 1 = 12 V , E 2 = 10 V , E 3 = 8 V , R 1 = 4 Ω , R 2 = 4 Ω , R 3 = 5 Ω 1- K étant ouvert, calculer la tension aux bornes de K. 2- K étant fermé, calculer les intensités dans les trois branches. R 1 R 2 R 3 E 1 E 2 E 3 K EXERCICE N ° 3 1 -En utilisant les lois de Kirchhoff, calculer l’intensité du courant dans la branche AB du circuit suivant . E = 12 V , r = 5 Ω , R = 1 Ω 2 - Même question en utilisant le théorème de superposition A B R R R R r E 2 E A B EXERCICE N ° 2 2009 - 2010
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TD N°8 D’ÉLECTROCINÉTIQUE : DIPÔLES LINÉAIRES Page 2 sur 4 Dans le montage suivant, calculer : 1. AB U 2. BC U 3. DE U 4. EF U 5. DF U 1 – Exprimer V S en fonction de V E dans le cas K fermé et dans le cas K ouvert pour le montage de la figure a.
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