Brennan, Thomasena and Goldberg, Leo (2012) Handbook of electric current and electronics. Academic Studio, Delhi, India. ISBN 9788132309017
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Abstract
Electric current is a flow of electric charge through a medium. This flowing electric charge is typically carried by moving electrons in a conductor such as wire. It can also be carried by ions in an electrolyte, or it can be carried by both ions and electrons in a plasma. The SI unit for measuring the rate of flow of electric charge is the ampere, which is charge flowing through some surface at the rate of one coulomb per second. Electric current is measured using an ammeter. The conventional symbol for current is I, which may seem puzzling. It originates from the French phrase intensive de courant, or in English current intensity. This phrase is frequently used when discussing the value of an electric current, especially in older texts; modern practice often shortens this to simply current but current intensity is still used in many recent textbooks. The I symbol was used by André-Marie Ampère himself, after whom the unit of electric current is named, in formulating the eponymous Ampère's force law which he discovered in 1820. The notation travelled from France to England where it became standard, although at least one journal did not change from using C to I until 1896. In metallic solids, electricity flows by means of electrons, from lower to higher electrical potential. In other media, any stream of charged objects may constitute an electric current. To provide a definition of current that is independent of the type of charge carriers flowing, conventional current is defined to flow in the same direction as positive charges. So, in metals where the charge carriers (electrons) are negative, conventional current flow in the opposite directions as the electron.
| Item Type: | Book |
|---|---|
| Divisions: | Electronic Books |
| Depositing User: | Esam @ Hisham Muhammad |
| Date Deposited: | 02 Jan 2024 06:13 |
| Last Modified: | 02 Jan 2024 06:13 |
| URI: | http://odlsystem2.utm.my/id/eprint/4294 |
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