Chapter 3 
DC Electricity
“Electricity is actually made up of extremely tiny particles called electrons, that you cannot see with the naked eye unless you have been drinking.”
Dave Barry
Voltage, resistance, and current are not always easy concepts to grasp because electrons are far too small to see. Imagine how our perception of water might change if we couldn’t see it. People would appear to magically fly through the air when they were swimming, and ocean waves would appear to be unexplainable forces that could knock you over at seemingly random times. But since we can see water we can easily understand the concepts of water pressure and water ...
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