It's evident that ampere's law is used to calculate the magnetic field produced by flowing charges. Can I use Gauss's Law to calculate the electric field produced by the flowing charges also????? I ask this question because in the middle of a solid conductor, there is a flow of charge. However, in the static case there is no charge in the middle of a solid conductor. So, does Gauss's law inside a solid conductor hold as long as I know how much charge is enclosed at a given time????