Title: Terminale / Physique / Chapitre 15 électricité

Q: Formule de la charge en fonction de la capacité
A: Q = C × u_C

Q: u_C + u_R = E
≡ u_C + [...] = E
A: R ⋅ i

Q: u_C + u_R = E
≡ u_C + R ⋅ i = E
≡ u_C + R
dq
dt
= E
≡ u_C + [...] = E
A: R ⋅ C
du_c
dt

Q: u_C + u_R = E
≡ u_C + R ⋅ i = E
≡ u_C + R
dq
dt
= E
≡ u_C + R ⋅ C
du_c
dt
= E
≡
d[...]
dt
+ [...] u_C = [...]
A: u_c; 1
R ⋅ C; E
R ⋅ C

Q: du_c
dt
+
1
R ⋅ C
u_C =
E
R ⋅ C
u_C = A + B e^[...]
A: -
t
R ⋅ C

u_C = A + B e^-
^t
^R ⋅ C
en t = 0 u_C = A + B = 0
en t = +∞ u_C = A = E
donc A = -B
donc A = E et B = -E
donc u_C = E - E e^-
^t
^R ⋅ C

Q: [...] = temps caractéristique = [...]
A: τ; R × C

Q: u_C + u_R = E
≡ u_C + R ⋅ i = E
≡ u_C + [...] = E
A: R
dq
dt

Q: u_C + u_R = 0
≡ u_C + [...] = 0
A: R ⋅ i

Q: u_C + u_R = E
≡ u_C + R ⋅ i = 0
≡ u_C + [...] = 0
A: R
dq
dt

Q: u_C + u_R = 0
≡ u_C + R ⋅ i = 0
≡ u_C + R
dq
dt
= 0
≡ u_C + [...] = 0
A: R ⋅ C
du_c
dt

Q: u_C + u_R = 0
≡ u_C + R ⋅ i = 0
≡ u_C + R
dq
dt
= 0
≡ u_C + R ⋅ C
du_c
dt
= 0
≡
d[...]
dt
+ [...] u_C = 0
A: u_c; 1
R ⋅ C

Q: du_c
dt
+
1
R ⋅ C
u_C = 0
u_C = A e^[...]
A: -
t
R ⋅ C

Q: u_C = A e^-
^t
^R ⋅ C
en t = 0 u_C = [...] = [...]
donc u_C = [...]
A: A; E; E e^-
^t
^R ⋅ C