Part Four: Electricity and Automation Summary and Analysis

Electricity comes from the movement of electrons, the tiny particles which circle the outer ring of an atom and carry a negative charge. The author tells us that there are three principles which govern the flow of electricity: "The electrons always need energy to make them move. They always travel in a set direction (from negative to positive) at a set speed. Furthermore, they will always produce particular effects while they are on the move." (Page 256) These particular effects are magnetism, heat, and/or light.

Static electricity happens when electrons are rubbed, shuffled or brushed off one surface onto another. The original object now has a positive charge while the object which has gotten all of its loose electrons has a negative charge. These opposites will always attract and draw together. Two negative...