PX157 - Dx2 - maxwell's equations

ϕE=⊂EdS=Qencl./ϵ0 BdS=0 CEdl=dϕBdt=ddtSBdS Bdl=μ0I+μ0ϵ0dϕEdt=μ0SJdS+μ0ϵ0ddtSEdS