1. If the surface charge density on the surface of a conductor is 10 mC/ m2, what is the electric flux density just above its surface?
2. Consider an interface between free space and a dielectric medium with dielectric constant of 5. The normal component of the D- field in free space is 10 C/m2, and the tangential component of the E- field in the dielectric medium is 100 V/m. Find their counterparts.