c16_condensateur.py

Created by anaali

Created on April 18, 2024

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# Type your text here
un condensateur est composé de
2 armature chargé electriquement
séparé apr un isolan
En regime permanent:
  I=Q/dt 
  I=> intensité du courant, A
  Q=> charge electrique (C)
  dt=> durée(s)
regime variable:
  i=(q(t+dt)-qt)/dt
   = dq/dt
C= Epsi*S/e
C=> capacité (F)
Epsi=> permitivité (F/m)
S=> surface des armature (m**2)
e=> distance separant les armatu

qA=C*Uab
(qA=>C, C=>F, Uab=>V)


Loi d'additivité/des mailles:
  charge :E=Ur+Uc
  decharcge:Ur+Uc=0
Loi d'Ohm:
  Ur=R*i
to=R*C
max pour 5 to
démo to en seconde: 
  Ohm: Ur=R*I=>R=Ur/i
  Q=C*V=>C=Q/v + I=A/dt=>Q=I*d
  d'ou C=(i*dt)/V
  to=R*C=Ur/I*(I*dt)/u 
    =(Ur*dt)/U
  to s'exprime en V*s/V = s
démo 63%:
  Uc=E(1-e**(-t/to))
  a t=to
  Uc=E(1-e**1)
  Uc= E*0,63
  
Equa diff:
  loi additivité: E=Uc+Ur
  or, loi ohm :ur=R*i
  de plus i=Dq/dt et q=d*Uc
  d'ou i=c(DUc/dt)
  Donc Ur=RC*dUc/dt
  ainsi E=Uc+RC*dUc/dt
to=R*C
micro=>-6, nano=>-9

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