By Brian Elliott
Grasp the foremost parts of electromechanical parts necessary to the layout, fix, or operation of your electromechanical units, this quick-find reference presents illustrations, descriptions, and correct calculations for 2,000 time-tested electromechanical elements.
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Example text
We click the switch and expect the light to come on. If it doesn’t, we’re annoyed that we have to replace the bulb. The subtle complexities of a modern light bulb, let alone that of the power generation and distribution system that allows it to do its job, are out of the realm of comprehension for most people, and even most engineers. Those of us that occasionally think about the light bulb, generally considered it to be an electrical device. After all, the most common ratings on a light bulb are volts and watts, electrical terms.
Lead/Acid Batteries Beaker − + Zinc Electrode Hydrogen Dilute Sulfuric Acid (Electrolyte) Copper Electrode Zinc Sulfate Light Bulb Figure 3-9 Simple Cell Figure 3-9 shows how a simple storage battery operates. Two electrodes are immersed into an electrolyte bath. The negative terminal is zinc, the positive terminal is copper, and the electrolyte is dilute sulfuric acid. When the electrodes are placed into the electrolyte they both have the same potential. When a power source is connected to the electrodes for charging, a chemical process takes place.
The house’s outlets are then connected to the output of each breaker in further parallel branch circuits. − Knife Switch 1 Light Bulb 1 Knife Switch 2 Light Bulb 2 Battery Figure 1-12 Parallel Circuit 6 Electromechanical Devices & Components Illustrated Sourcebook + − + − Knife Switch 1 Battery 1 Light Bulb Battery 2 Knife Switch 2 Figure 1-13 Series Circuit Power distribution systems in automobiles are also parallel circuits. In the case of the automobile there are two power sources, the battery and the alternator or generator.