∇
⋅
E
=
ρ
ϵ
∇
⋅
B
=
0
∮
C
E
⋅
d
l
=
−
∂
Φ
∂
t
∮
C
B
⋅
d
l
=
∬
S
(
μ
0
J
+
μ
0
ϵ
0
∂
E
∂
t
)
d
S