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  2. Electric current - Wikipedia

    en.wikipedia.org/wiki/Electric_current

    In other media, any stream of charged objects (ions, for example) may constitute an electric current. To provide a definition of current independent of the type of charge carriers, conventional current is defined as moving in the same direction as the positive charge flow. So, in metals where the charge carriers (electrons) are negative ...

  3. Electric power - Wikipedia

    en.wikipedia.org/wiki/Electric_power

    Electric power is the rate of transfer of electrical energy within a circuit.Its SI unit is the watt, the general unit of power, defined as one joule per second.Standard prefixes apply to watts as with other SI units: thousands, millions and billions of watts are called kilowatts, megawatts and gigawatts respectively.

  4. English grammar - Wikipedia

    en.wikipedia.org/wiki/English_grammar

    The first published English grammar was a Pamphlet for Grammar of 1586, written by William Bullokar with the stated goal of demonstrating that English was just as rule-based as Latin. Bullokar's grammar was faithfully modeled on William Lily's Latin grammar, Rudimenta Grammatices (1534), used in English schools at that time, having been ...

  5. Alternating current - Wikipedia

    en.wikipedia.org/wiki/Alternating_current

    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.

  6. English prepositions - Wikipedia

    en.wikipedia.org/wiki/English_prepositions

    The meaning was essentially the same as the general idea today: a simple word preceding a noun expressing a relation between it and another word. [9] William Bullokar wrote the earliest grammar of English, published in 1586. It includes a chapter on prepositions. His definition follows:

  7. Power outage - Wikipedia

    en.wikipedia.org/wiki/Power_outage

    Vehicle lights provided the only illumination during the 2009 Ecuador electricity crisis.. A power outage, also called a powercut, a power out, a power failure, a power blackout, a power loss, a blackout or a power drought — is the loss of the electrical power network supply to an end user.

  8. Instrumental case - Wikipedia

    en.wikipedia.org/wiki/Instrumental_case

    In Old English, the instrumental case denotes means or manner, in such phrases as "oþre naman Iulius" ('by other name called Julius') or expressions of time: "þy ilcan dæge"; 'on the same day'. [6] (In these examples, the whole expression is in the instrumental case, but only the oþre or þy is distinctive in form from the dative.)

  9. Geomagnetically induced current - Wikipedia

    en.wikipedia.org/.../Geomagnetically_induced_current

    The surface electric field causes electrical currents, known as geomagnetically induced currents (GIC), to flow in any conducting structure, for example, a power or pipeline grid grounded in the Earth. This electric field, measured in V/km, acts as a voltage source across networks.

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