I've read multiple times that electric field inside of the conductor is always equal to zero because the inner field produced by electrons that moved to one side and left protons on another balance the outer field. I've also read about Faraday cage. But I have a few questions about this: 1) So it means that current can only flow on the surface of conductor no matter what?How can electric field be produced on the surface if it is always zero inside then? Or maybe this is only for electrostatics?But I don't understand how Faraday cage works if clearly there is current on it. I've also read that dielectrics polarize when they are placed inside of the electric wave but the dipoles are not able to create an inner field that completely balances the outer field,they say that it can only weaken it but not balance it. 2) K,sure,but then it means that in dielectric current can also flow through the inside of the dielectric unlike at the conductor?I don't understand this... Sorry for dumb questions guys.