![]() ![]() Ductility is a measure of a material’s ability to be drawn into wires and a measure of the flexibility of the material, and copper has a high ductility. ![]() A third important characteristic is ductility. Copper has a high tensile strength, 2 × 10 8 N m 2 2 × 10 8 N m 2. The tensile strength of a material is the maximum amount of tensile stress it can take before breaking. Also important is the tensile strength, where the tensile strength is a measure of the force required to pull an object to the point where it breaks. Copper has the highest electrical conductivity rating, and therefore the lowest resistivity rating, of all nonprecious metals. ( 3.5 − 60 ) × 10 −5 ( 3.5 − 60 ) × 10 −5Ĭheck Your Understanding Copper wires are routinely used for extension cords and house wiring for several reasons. In these cases, the current density can be modeled as In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. The current density J → J → that results depends on the electrical field and the properties of the material. When a voltage is applied to a conductor, an electrical field E → E → is created, and charges in the conductor feel a force due to the electrical field. This resistivity is crudely analogous to the friction between two materials that resists motion. The material can resist the flow of the charges, and the measure of how much a material resists the flow of charges is known as the resistivity. The amount of current depends not only on the magnitude of the voltage, but also on the characteristics of the material that the current is flowing through. The electrical field, in turn, exerts force on free charges, causing current. When a voltage source is connected to a conductor, it applies a potential difference V that creates an electrical field. All such devices create a potential difference and are referred to as voltage sources. What drives current? We can think of various devices-such as batteries, generators, wall outlets, and so on-that are necessary to maintain a current. State the relationship between resistivity and temperature.State the relationship between resistance of a resistor and its length, cross-sectional area, and resistivity.Describe the electrical component known as a resistor.Differentiate between resistance and resistivity.Links to other websites are provided for search convenience only and do not constitute endorsement of material at those sites or any associated organisation, product or service.By the end of this section, you will be able to: Without limiting the generality of the foregoing, nothing in this website constitutes, and must not be relied upon as, advice such as legal or financial advice. To the maximum extent permitted by law, the GOJ excludes any liability which may arise as a result of the use of this website, its content or the information on it. The GOJ makes no representations about the content of this website. This includes, but is not limited to, the transmission of any computer viruses. GOJ does not accept any responsibility for loss or damage suffered by any person or body in connection with the use of this website. The GOJ Houses of Parliament Website does not guarantee that the information is complete or correct, although it is considered to be correct at the time of publishing. By accessing or using this website, you agree to the Disclaimer on this page.Īll material published electronically on the Government of Jamaica (GOJ) Houses of Parliament Design Competition website is for information purposes only.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |