Capacitor Definition And Function Pdf

capacitor definition and function pdf

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It consists of at least two electrical conductors separated by a distance. You will learn more about dielectrics in the sections on dielectrics later in this chapter.

Whenever an electric voltage exists between two separated conductors, an electric field is present within the space between those conductors. In basic electronics, we study the interactions of voltage, current, and resistance as they pertain to circuits, which are conductive paths through which electrons may travel. Despite its abstract nature, almost every one of us has direct experience with fields, at least in the form of magnets. Have you ever played with a pair of magnets, noticing how they attract or repel each other depending on their relative orientation? Physicists describe the interaction of magnets in terms of magnetic fields in the space between them.

Plastic Film & Paper Dielectric Capacitors

Capacitors are electrical devices that store energy, and they are in most electrical circuits. The two major types of capacitors are polarized and non-polarized. The way in which a number of capacitors are connected determines their value in a circuit. Their combined value is highest when they are connected in a series, positive to negative. Their combined value is lowest when they are connected in parallel, end to end. Capacitors combined with resistors and inductors in a circuit are used in electrical timing of events as well as in motors, fans, televisions, automobiles and many other consumer products and high-energy environments. Some capacitors have distinct positive and negative poles.

Electricity Basics: Resistance, Inductance and Capacitance

Capacitor , device for storing electrical energy , consisting of two conductors in close proximity and insulated from each other. A simple example of such a storage device is the parallel-plate capacitor. See also electricity: Principle of the capacitor. Capacitors have many important applications. They are used, for example, in digital circuits so that information stored in large computer memories is not lost during a momentary electric power failure; the electric energy stored in such capacitors maintains the information during the temporary loss of power. Capacitors play an even more important role as filters to divert spurious electric signals and thereby prevent damage to sensitive components and circuits caused by electric surges.

• In its simplest form, a capacitor is an electrical. device constructed of two parallel plates separated. by an insulating material called the dielectric. • In the neutral state, both plates have an equal. number of free electrons.

Capacitor Uses & Applications

Electronic circuits are integral parts of nearly all the technological advances being made in our lives today. Television, radio, phones and computers immediately come to mind, but electronics are also used in automobiles, kitchen appliances, medical equipment and industrial controls. At the heart of these devices are active components, or components of the circuit that electronically control electron flow, like semiconductors.

Electric Fields and Capacitance


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