physique_elec.py

Created by lisa-malbois

Created on October 06, 2023

675 Bytes

I=Q/T
courant va pas dans le meme sens que les electrons
Uab = Va -Vb
fleche pointe vers le plus haut potentiel
Uab = -Uba
Uac = Uab + Ubc
generateur, I et U meme sens
recepteur, I et U sens oppose
ARQS :
si taux<<T, taux = L/c, T : periode
Kirchhoff (noeuds, mailles) + Ohm
Modèle de Thevenin : U=E-rI
source ideale de tension : U=E (tant que I<5A)
source ideale de courant : Io est debite pour tout U
bobine :
UL = L* di/dt soit U = L* di/dt +ri
condensateur : i = dq/dt = dCu/dt = Cdu/dt
car q=Cu
serie des resistances :
R=R1+R2
paralleles des resistances :
1/R = 1/R1+1/R2
Pont diviseur de tension (PDT):
U2 = R2/(R1+R2) *U
PDC :
I2 = R1/(R1+R2) *I

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