Conductors, electric power

Electrical Conductors and Insulators 264 Resistance 265 Conductance 266 Electrical Diagrams 266 Series Circuits 267 Parallel Circuits 268 Electrical Power 271 Electrical Energy 272... 

Electrical power is transmitted at high voltage because, for a given power carried on a fine, when the voltage is doubled the current is halved. As a result the quantity of conductor material can be reduced to a quarter for the same power loss (I2R) in the line (see Eq. (2.27)). Therefore, since the cost of conductor materials is high compared with other costs, very significant economies result... 

Elapid snakes Elasticity Electric arc Electric charge Electric circuit Electric conductor Electric current Electric motor Electric vehicles Electrical conductivity Electrical power supply Electrical resistance Electricity... 

Metallic solids Recall from Chapter 8 that metallic solids consist of positive metal ions surrounded by a sea of mobile electrons. The strength of the metallic bonds between cations and electrons varies among metals and accounts for their wide range of physical properties. For example, tin melts at 232°C, but nickel melts at 1455°C. The mobile electrons make metals malleable—easily hammered into shapes—and ductile—easily drawn into wires. When force is applied to a metal, the electrons shift and thereby keep the metal ions bonded in their new positions. Read Everyday Chemistry at the end of the chapter to learn about shape-memory metals. Mobile electrons make metals good conductors of heat and electricity. Power lines carry electricity from power plants to homes and businesses and to the electric train shown in Figure 13-21a. 

The photovoltaic devices are the most modern. They are semi-conductor or. in other words, solid-state components, and they incorporate the principle of the conversion of radiant energy directly into usable electrical power. The photovoltaic phenomenon is founded upon the basic photoelectric equation of Albert Einstein, namely ... 

A major study was funded by the Electric Power Research Institute to evaluate the effects of electrochemical trees in eictruded cable materials (29). The primary objective of this work was to quantify the major parameters responsible for their formation. Using coated wires with 14 AWG solid round or square conductors and with 0.75 mm insulation, accelerated experiments were performed under aqueous conditions. Over... 

Intercoimects are conductors of power and electrical signals between solid-state devices in integrated circuits. As described by Moore s law the number of transistors... 

Energize(d) - To send eiectricity through a electricity transmission and distribution network a conductor or power line that is carrying current. 

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