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From Wikiversity
Định luật điện từ
Định luật Coulomb
F
Q
=
K
Q
+
Q
−
r
2
{\displaystyle F_{Q}=K{\frac {Q_{+}Q_{-}}{r^{2}}}}
Định luật Ampere
I
=
∫
H
d
l
{\displaystyle I=\int Hdl}
B
=
L
I
{\displaystyle B=LI}
Định luật Gauss
Φ
E
=
∮
S
E
⋅
d
A
=
1
ϵ
o
∫
V
ρ
d
V
=
Q
A
ϵ
o
{\displaystyle \Phi _{E}=\oint _{S}\mathbf {E} \cdot d\mathbf {A} ={1 \over \epsilon _{o}}\int _{V}\rho \ dV={\frac {Q_{A}}{\epsilon _{o}}}}
Φ
B
=
∮
S
B
⋅
d
s
=
μ
0
I
e
n
c
{\displaystyle \Phi _{B}=\oint _{S}\mathbf {B} \cdot d\mathbf {s} =\mu _{0}I_{\mathrm {enc} }}
Định luật Lentz
−
ϕ
=
−
B
A
{\displaystyle -\phi =-BA}
Định luật Faraday
−
ϵ
=
−
∫
E
d
l
=
−
d
ϕ
B
d
t
{\displaystyle -\epsilon =-\int Edl=-{\frac {d\phi _{B}}{dt}}}
Định luật Maxwell-Ampere
∮
C
H
⋅
d
l
=
∬
S
J
⋅
d
A
+
d
d
t
∬
S
D
⋅
d
A
{\displaystyle \oint _{C}\mathbf {H} \cdot \mathrm {d} \mathbf {l} =\iint _{S}\mathbf {J} \cdot \mathrm {d} \mathbf {A} +{\mathrm {d} \over \mathrm {d} t}\iint _{S}\mathbf {D} \cdot \mathrm {d} \mathbf {A} }
∮
S
B
⋅
d
s
=
μ
0
I
e
n
c
+
d
Φ
E
d
t
{\displaystyle \oint _{S}\mathbf {B} \cdot d\mathbf {s} =\mu _{0}I_{\mathrm {enc} }+{\frac {d\mathbf {\Phi _{E}} }{dt}}}
Phương trình Maxwell
Category
:
Điện từ