alternating current - определение. Что такое alternating current
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Что (кто) такое alternating current - определение

ELECTRIC CURRENT WHICH PERIODICALLY REVERSES DIRECTION
Alternating-current electric power; Alternating current electric power; Alternate current; AC current; Alternating Current; Alternating-current circuit theory; Alternating-current generator; Alternating-current motor; Alternating-current; Alternate Current; AC electricity; Alternating Current Power; V ac; Oscillating current; AC frequency; ⏦; AC voltage; Root mean square AC voltage; AC mains; AC Mains; Ac Current; A.C. current; A.C. voltage; Undulatory current; Undulating current
  • The prototype of the ZBD transformer on display at the Széchenyi István Memorial Exhibition, [[Nagycenk]] in [[Hungary]]
  • 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.
  • Three-phase high-voltage [[transmission line]]s use alternating currents to distribute power over long distances between [[electric generation]] plants and consumers. The lines in the picture are located in eastern [[Utah]].
  •  Period
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  • A sine wave, over one cycle (360°). The dashed line represents the [[root mean square]] (RMS) value at about 0.707.
  • Alternating current (green curve). The horizontal axis measures time (it also represents zero voltage/current); the vertical, current or voltage.
  • Westinghouse Early AC System 1887<br /> ([https://web.archive.org/web/20090325121254/http://www.pat2pdf.org/patents/pat373035.pdf US patent 373035])
  • The Hungarian "ZBD" Team ([[Károly Zipernowsky]], [[Ottó Bláthy]], [[Miksa Déri]]), inventors of the first high efficiency, closed-core shunt connection [[transformer]]

alternating current         
(abbrev.: AC)
¦ noun an electric current that reverses its direction many times a second at regular intervals. Compare with direct current.
Alternating current         
·add. ·- A current which periodically changes or reverses its direction of flow.
alternating current         
(alternating currents)
An alternating current is an electric current that continually changes direction as it flows. The abbreviation AC
is also used.
N-VAR

Википедия

Alternating current

Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC), which flows only in one direction. Alternating current is the form in which electric power is delivered to businesses and residences, and it is the form of electrical energy that consumers typically use when they plug kitchen appliances, televisions, fans and electric lamps into a wall socket. A common source of DC power is a battery cell in a flashlight. The abbreviations AC and DC are often used to mean simply alternating and direct, respectively, as when they modify current or voltage.

The usual waveform of alternating current in most electric power circuits is a sine wave, whose positive half-period corresponds with positive direction of the current and vice versa. In certain applications, like guitar amplifiers, different waveforms are used, such as triangular waves or square waves. Audio and radio signals carried on electrical wires are also examples of alternating current. These types of alternating current carry information such as sound (audio) or images (video) sometimes carried by modulation of an AC carrier signal. These currents typically alternate at higher frequencies than those used in power transmission.

Примеры употребления для alternating current
1. We had recently acquired our first direct current defibrillator, more effective and safer than the alternating current devices.
2. The device generates plasma with an alternating current of industrial frequency and injects it to rapidly heat or cool the surface of a product to be processed.
3. For decades this remained a laboratory curiosity, but was used in the first world war to generate ultrasound signals (by applying a high–frequency alternating current to make a crystal vibrate) for early sonar, and in the second world war to make impact–triggered detonators for bombs dropped from aircraft: striking the ground triggered a spark to ignite the explosives inside.