direct current


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Related to direct current: alternating current

current

 [kur´ent]
1. something that flows.
2. specifically, electricity transmitted through a circuit.
alternating current a current that periodically flows in opposite directions; its amplitude fluctuates as a sine wave.
convection current a current caused by movement by convection of warmer fluid into an area of cooler fluid.
direct current a current that flows in one direction only; when modeled as a wave, its amplitude is constant. When used medically it is called galvanic current. This current has distinct and important polarity and marked secondary chemical effects.
galvanic current a steady direct current.
current of injury an electric current that flows between injured myocardium and normal myocardium, because such cells have a reduced membrane potential; it may be either diastolic or systolic.
current of injury, diastolic the current that flows from injured to noninjured tissue during electrical diastole.
current of injury, systolic the current that flows from healthy tissue to injured tissue during electrical systole.
inwardly rectifying current current that rectifies so that it passes more easily towards the interior of a cell.
leakage current the electrical current that exists in the parts or metal case of electrical equipment.
outwardly rectifying current current that rectifies so that it passes more easily towards the exterior of a cell.
potassium rectifying c's transmembrane currents that rectify inwardly or outwardly to make adjustments in cellular functions; they are mainly responsible for the repolarization phase of the action potential. There are at least six mechanisms by which potassium ions move across cardiac cell membranes in the role of rectifier.

di·rect cur·rent (DC),

a current that flows only in one direction, for example, that is derived from a battery; sometimes referred to as galvanic current.
See also: galvanism.

direct current (DC)

an electric current that flows in one direction only and is substantially constant in value. Compare alternating current.

direct current

A continuous electromagnetic current that flows in only one direction.

di·rect cur·rent

(DC) (di-rekt kŭrĕnt)
An electrical current that flows only in one direction; e.g., that derived from a battery; sometimes referred to as galvanic current.

di·rect cur·rent

(DC) (di-rekt kŭrĕnt)
An electrical current that flows only in one direction; also referred to as galvanic current.

current

that which flows; electric transmission in a circuit.

alternating current
a current that flows in opposite directions sinusoidally.
direct current
a current whose direction is always the same.
References in periodicals archive ?
It should be noted that while even a prolonged passage of alternating current of a value lower than the threshold of perception does not produce adverse effects, in the case of direct current an electrolytical action may occur leading to pathological alterations.
Additional supply of single-phase, three-phase meters for direct connection to a switching relay and PLC modem for S-FSK modulation, three-phase indirect power meters for PLC modem for S-FSK modulation and Routers for PLC with S-FSK modulation with built-in 2G or 3G GSM modem to the already built-in remote energy accounting system by means of the implemented software named SIMS, developed by ADD Production SRL, Moldova, implemented in 2006, including: Single-phase direct current meters, with an estimated non-binding quantity of 59,500 units; Three-phase direct current meters, with an estimated non-binding quantity of 10 900 pieces; Three-phase indirect meters, with an estimated non-binding quantity of 2,390 pieces; Routers, with an estimated non-binding quantity of 425 units.
The text explains how to design direct current (dc) power systems that operate at nominal voltages of 24 and 48 volts dc, use lead-acid batteries, and are installed in public network telecommunications systems and other exclusive-use environments.
The rectangular wire provides more copper in the same area that round wire would occupy, reducing the direct current resistance in a lower profile volume.
Both converters, which are meant to turn the alternating current into the direct current one and then back again, constitute an essential part of the installation.
Dataprobe, a leading manufacturer of innovative technology solutions for networking, systems and site management, has released a direct current (DC) version of its iBoot remote power solution.
Construction of just over 400 km of new, high-voltage direct current (HVDC) and alternating current (AC) overhead lines in Newfoundland and Labrador and Nova Scotia.
Technipower provides high value added, precision, direct current power supplies and power supply systems for applications where high reliability and ruggedness are critical.
Contract notice: Service and Repair of Direct Current and Alternating Current Electric Motors TC0866.
TSX VENTURE:SBX), on behalf of its affiliated subsidiary, Sea Breeze Victoria Converter Corporation ("Sea Breeze Victoria") announces its decision to withdraw its application for a Certificate of Public Convenience and Necessity ("CPCN Application") to construct a 550 MW direct current submarine transmission cable between Greater Vancouver and Greater Victoria on Vancouver Island, which is presently before the British Columbia Utilities Commission.
Direct current offers many advantages compared to the conventional alternating current used today: For example, losses in power grids and electric devices are a total of 5 to 7 percent smaller than with alternating current.

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