As we have said earlier (see chapter 2) an atom consists of a nucleus, with negatively charged electrons circulating around, or orbiting, it. If we can disengage electrons and cause them to flow or move along a conductor in a certain direction, we have created a current of electricity. Even a small current involves millions of electrons. The electrons proceed down a wire by a series of jumps from atom to atom (figure 10.1).
Unable to display preview. Download preview PDF.