direct current - définition. Qu'est-ce que direct current
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Qu'est-ce (qui) est direct current - définition

UNIDIRECTIONAL FLOW OF ELECTRIC CHARGE
DC current; Continous current; Direct-current; Continuous current; Direct Current; Galvanic current; Direct current circuit; DC machines; LVDC; Direct-current electricity; Electric direct current; DC power; ⎓; Direct circuit circuit; DC voltage; DC electricity; Dc Current; D.C. current; D.C. voltage
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  • Types of direct current
  • 2393}} (⎓) is found on many electronic devices that either require or produce direct current.
  • Direct current (DC) (red line). The vertical axis shows current or voltage and the horizontal 't' axis measures time and shows the zero value.

Direct current         
·add. ·- A current flowing in one direction only;
- distinguished from alternating current. When steady and not pulsating a direct current is often called a continuous current.
II. Direct current ·add. ·- A direct induced current, or momentary current of the same direction as the inducing current, produced by stopping or removing the latter; also, a similar current produced by removal of a magnet.
Direct current         
Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power.
direct current         
(direct currents)
A direct current is an electric current that always flows in the same direction. The abbreviation DC
is also used.
Some kinds of batteries can be recharged by connecting them to a source of direct current.
N-VAR

Wikipédia

Direct current

Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. The electric current flows in a constant direction, distinguishing it from alternating current (AC). A term formerly used for this type of current was galvanic current.

The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.

Direct current may be converted from an alternating current supply by use of a rectifier, which contains electronic elements (usually) or electromechanical elements (historically) that allow current to flow only in one direction. Direct current may be converted into alternating current via an inverter.

Direct current has many uses, from the charging of batteries to large power supplies for electronic systems, motors, and more. Very large quantities of electrical energy provided via direct-current are used in smelting of aluminum and other electrochemical processes. It is also used for some railways, especially in urban areas. High-voltage direct current is used to transmit large amounts of power from remote generation sites or to interconnect alternating current power grids.

Exemples du corpus de texte pour direct current
1. We had recently acquired our first direct current defibrillator, more effective and safer than the alternating current devices.
2. It has no side effect in comparison with the existing electro puncture appliances and physiotherapist appliances using direct current and low frequency, high frequency, ultrasonic waves and microwave.
3. When the space station is completed in 2010, the solar arrays will provide about a quarter of its power, or more than 32 kilowatts of direct current power.
4. The CSP–generated electricity would be transmitted around the region via a "supergrid" of high voltage direct current (HVDC) transmission lines.
5. Voss and other experts said there is little or no risk because many aircraft electrical systems run on direct current –– like the current in batteries –– and usually shut down in an emergency.