I have a couple of questions about basic electricity concepts. First of all, is the "default" state of things to be neutrally charged, so that their level of conductivity is the only thing that matters. Secondly, I have a question about the common demonstration with a glass rod and a piece of silk cloth that rubs against it to get the glass charged. Is the glass neutrally charged and the cloth neutrally charged too? If so, how would there be any kind of attraction or anything between them? If everything is neutrally charged by "default" then how can there ever be any charges transmitted?I guess more generally, my question is why and how friction causes electrical charge to be transmitted or does it create electrical charge?