As a certified Electrician practicing in California, I have access to several sources of basic information about the fundamentals of electricity, but unfortunately many of them are proprietary, and I cannot pass them on. The link offered by Francisi is a good one, but it might be useful to know what the information is needed for. I don’t think that the crew building FF1 needs a primer, so is the information for FFS members who want to grasp the basic concepts? If so, the hose/water flow analogy used by Aeronaut is a powerful one, explaining voltage, current and resistance. Inductance and capacitance would be a bit more difficult since they require the subject to visualize processes which have no obvious analogue to use for illustration. Again, what is the target audience and how much would they need to know?