Basic electrical circuitry is actually quite simple. Pretend that an electron wishes to get from the positive side of the battery to the negative side. (They actually go the other way, due to a bad naming guess by the original scientists, but that's irrelevant.) How does it get there? Follow its journey along the map (schematic diagram) from the hotter side (positive) to the notter side (negative) of each circuit element along the way. As it travels through each element designed to extract energy from this motion (lights, motors) some work is performed, and some heat is generated. As it travels through everything else, some heat is generated. (Ideally, not much.) Open switches, or fuses, or wires, stop the journey. More than one moving electron is required for any significant action to take place. For example, your test light probably needs 3 quintillion of them a second to light at full brilliance. You use it by inserting it into a path, or bridging an open path, and seeing if (m)any of the little buggers now have an intact road they can travel.
-- Jim _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
