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sterlingrobinson35
05.04.2021 •
Physics
+
17 Interrupteur ouvert ou fermé
D4 l'utilise une démarche scientifique
Dans le circuit ci-dessous, la tension aux bornes du géné-
rateur est U= 12 V.
1. On considère l'interrupteur
V
COM
ouvert.
a. Le voltmètre V2 indique-t-il
une tension U, non nulle aux
bornes de la lampe ? Justifier
votre réponse.
R
b. Quelle tension U, indique le
voltmètre V, aux bornes de la
M
pile ? Justifier votre réponse.
COM
c. Quelle est la tension UK aux
bornes de l'interrupteur K?
Justifier votre réponse.
2. On considère l'interrupteur fermé.
a. Quelle est la tension UK aux bornes de l'interrupteur K?
Justifier votre réponse.
b. On a mesuré les tensions aux bornes :
- du récepteur R, UR = 2,2 V;
- du moteur, UM = 3,7 V.
Que vaut la tension Uaux bornes de la lampe ?
V
Solved
Show answers
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Ответ:
Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!
cutt.ly/XzW3SUN