Learning Objectives By the end of this section, you will be able to: What drives current? We can think of various devices—such as batteries, generators, wall outlets, and so on—which are necessary to maintain a current. All such devices create…
Learning Objectives By the end of this section, you will be able to: Electric Current Electric current is defined to be the rate at which charge flows. A large current, such as that used to start a truck engine, moves…
Figure 20.1 Electric energy in massive quantities is transmitted from this hydroelectric facility, the Srisailam power station located along the Krishna River in India, by the movement of charge—that is, by electric current. (credit: Chintohere, Wikimedia Commons) Chapter Outline 20.1 Current 20.2 Ohm’s Law: Resistance…
Electric Potential Energy: Potential Difference Electric Potential in a Uniform Electric Field Electrical Potential Due to a Point Charge Equipotential Lines Capacitors and Dielectrics Capacitors in Series and Parallel Energy Stored in Capacitors
Learning Objectives By the end of this section, you will be able to: Most of us have seen dramatizations in which medical personnel use a defibrillator to pass an electric current through a patient’s heart to get it to beat normally. (Review Figure…
Learning Objectives By the end of this section, you will be able to: Several capacitors may be connected together in a variety of applications. Multiple connections of capacitors act like a single equivalent capacitor. The total capacitance of this equivalent…
Learning Objectives By the end of this section, you will be able to: A capacitor is a device used to store electric charge. Capacitors have applications ranging from filtering static out of radio reception to energy storage in heart defibrillators. Typically, commercial…
Learning Objectives By the end of this section, you will be able to: We can represent electric potentials (voltages) pictorially, just as we drew pictures to illustrate electric fields. Of course, the two are related. Consider Figure 19.8, which shows an…
Learning Objectives By the end of this section, you will be able to: Point charges, such as electrons, are among the fundamental building blocks of matter. Furthermore, spherical charge distributions (like on a metal sphere) create external electric fields exactly…
Learning Objectives By the end of this section, you will be able to: In the previous section, we explored the relationship between voltage and energy. In this section, we will explore the relationship between voltage and electric field. For example,…