∇ ⋅ 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