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A schematic representation of long distance electric power transmission. From left to right: G=generator, U=step-up transformer, V=voltage at beginning of transmission line, Pt=power entering transmission line, I=current in wires, R=total resistance in wires, Pw=power lost in transmission line, Pe=power reaching the end of the transmission line, D=step-down transformer, C=consumers.
Mains electricity, utility power, grid power, domestic power, wall power, household current, [2] or, in some parts of Canada, hydro, is a general-purpose alternating-current (AC) electric power supply.
An electric current is a flow of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is defined as the net rate of flow of electric charge through a surface.
In electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section. [1] The current density vector is defined as a vector whose magnitude is the electric current per cross-sectional area at a given point in space, its direction being that of the motion of the positive charges at this point.
Michael Faraday was born on 22 September 1791 in Newington Butts, [7] Surrey, which is now part of the London Borough of Southwark. [8] His family was not well off. His father, James, was a member of the Glasite sect of Christianity.
Diffusion current is a current in a semiconductor caused by the diffusion of charge carriers (electrons and/or electron holes).This is the current which is due to the transport of charges occurring because of non-uniform concentration of charged particles in a semiconductor.
A short circuit is an abnormal connection between two nodes of an electric circuit intended to be at different voltages. This results in an electric current limited only by the Thévenin equivalent resistance of the rest of the network which can cause circuit damage, overheating, fire or explosion.
Al Arus was established by Mary Ajami, a Syrian Orthodox, in Alexandria in 1910 as a 32-page women's magazine. [2] Its first issue appeared in December that year. [3] Ajami also edited the magazine which featured articles on history, literature, culture and medicine focusing on the problems of women. [4]