1. The problem statement, all variables and given/known data Why is the electric field, in static equilibrium, equal to zero. 3. The attempt at a solution The only way I can see why is to picture that there was an electric field inside a conductor. The field would cause the electrons to move freely inside the conductor. This movement of electrons would cancel out the electric field. That's my two cents. I'm sure I could expand on this more, but I'm confused because I'm having a really hard time trying to picture this in my head.