In my engineering mathematics class, I learned about Gauss' law and form of one Maxwell equation. I learned that
$∇∙E=ρ/ε$
in Maxwell's equation
$∇∙E=0$
in process of proving Gauss' law.
force of electric field has inverse proportion so I understood ∇∙E=0.
but why $∇∙E$ is not zero in Maxwell's equation?