At this point we switch from classical mechanics to electromagnetic theory. Learning to generate and use electricity was one of the greatest advances in the history of mankind. Not only did it provide light to eliminate the problems with darkness, it provided powerPower to run all of the devices and major pieces of equipment we use. We have become a society based on electricity. The next four chapters are dedicated to studying the properties of this important phenomenon. Some of the themes of the chapter are represented in Figs. 7.1, 7.2, 7.3, 7.4, 7.5 and 7.6. Figure 7.1 shows electricity traveling through the air. Figure 7.2 shows wires for conducting electricity. Figure7.3 shows transfer of electricity through touch. Figure 7.4 shows a place where electrical particles are accelerated. Figure 7.5 shows different shapes of capacitors for storing electrical charge. Figure7.6 shows electrical discharge in nature.