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Topic: Direct current

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War of Currents

Conventional current

Alternating current

Current (electricity)

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Diode bridge

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Electricity generation

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	Direct TV Satellite TV \| USDirect
		Bringing viewers the widest variety of television programming available today, Direct TV is the largest digital satellite service provider in the country.
		Direct TV now has a customer base of 15 million viewers.
		Direct TV offers subscribers only the best home theater equipment, with the most advanced digital video recorders (DVR) and satellite receivers available.
	www.usdirect.com (540 words)

	Direct Current (DC) Electricity - Succeed in Physical Science: School for Champions
		Direct current or DC electricity is the continuous movement of electrons from an area of negative (-) charges to an area of positive (+) charges through a conducting material such as a metal wire.
		Direct current or DC electricity is the continuous movement of electrons from negative to positive through a conducting material such as a metal wire.
		In a circuit, the direction of the current is opposite the flow of electrons.
	www.school-for-champions.com /science/dc.htm (0 words)

	Direct TV Satellite TV Deals \| USDirect
		Direct TV programming deals are varied and include packages containing from 50 channels up to over 250 channels.
		Everybody knows that Direct TV is the leader in the satellite television industry, as they provide 250 channels of great digital television to 15 million customers around the country.
		Viewers can program the Direct TV DVR to record an entire season's worth of their favorite shows, with the option of skipping reruns.
	www.usdirect.com /directv/direct-tv-satellite-tv-.html (0 words)

	first direct - current interest rates
		A Rate if your mortgage is with first direct or if you have no other mortgage borrowing.
		B Rate if you have a mortgage which is not with first direct.
		The net rate is the rate after the deduction of tax on interest, currently 20%.
	www.firstdirect-internetbank.com /rates/current.shtml (1017 words)

	Direct Current - Search Results - MSN Encarta
		Direct Current, electrical current that flows in one direction only.
		Current that flows in one direction only, such as the current in a battery-powered flashlight, is called direct current.
		If an armature revolves between two stationary field poles, the current in the armature moves in one direction during half of each revolution and in...
	encarta.msn.com /Direct_Current.html (173 words)

	Direct current - RecipeFacts (Site not responding. Last check: )
		Direct current (DC or "continuous current") is the constant flow of electric charge from high to low potential.
		Direct current installations usually have different types of sockets, switches, and fixtures, mostly due to the low voltages used, from those suitable for alternating current.
		High voltage direct current is used for long-distance point-to-point power transmission and for submarine cables, with voltages from a few kilovolts to approximately one megavolt.
	www.recipeland.com /facts/Direct_current (519 words)

	Direct current - Wikipedia, the free encyclopedia
		Direct current (DC or "continuous current") is the continuous flow of electric charge through a conductor such as a wire from high to low potential.
		High voltage direct current is used for long-distance point-to-point power transmission and for submarine cables, with voltages from a few kilovolts to approximately one megavolt.
		Direct current installations usually have different types of sockets, switches, and fixtures, mostly due to the very low voltages used, from those suitable for alternating current.
	en.wikipedia.org /wiki/Direct_current (507 words)

	Direct current (Site not responding. Last check: )
		Direct current (DC) is the continuous flow of electricity through a conductor such as a from high to low potential.
		It is usually extremely important a direct current appliance to not reverse unless the device has a diode bridge to correct for this.
		Direct democracy is an excellent introduction into the workings of democracy and the ambiguity of the various systems which claim the title of democracy.
	www.freeglossary.com /Direct_current (489 words)

	[No title]
		Direct current installations usually have different types of sockets, switches, and fixtures, mostly due to the very low voltages used, from those suitable for alternating current.
		It is usually extremely important with a direct current appliance to not reverse polarity unless the device has a bridge to correct for this.
		Even when no current is flowing through the wire, the electrons in the wire are moving at speeds up to 600 miles (1000 kilometers) per second but in random directions because the wire has a finite temperature.
	www.lycos.com /info/direct-current.html (455 words)

	Direct current Summary
		Direct current installations usually have different types of sockets, switches, and fixtures, mostly due to the low voltages used, from those suitable for alternating current.
		It is usually important with a direct current appliance not to reverse polarity unless the device has a diode bridge to correct for this.
		High voltage direct current is used for long-distance point-to-point power transmission and for submarine cables, with voltages from a few kilovolts to approximately one megavolt.
	www.bookrags.com /Direct_current (1018 words)

	Glossary: Alternating current / Direct current
		Current flowing in power lines and normal household electricity that comes from a wall outlet is alternating current.
		Direct current (DC) is electrical current which flows consistently in one direction.
		The current that flows in a flashlight or another appliance running on batteries is direct current.
	www.greenfacts.org /glossary/abc/alternating-current.htm (204 words)

	Directory:Sully Direct Current - PESWiki
		The multi-directional electric currents have the effect of accelerating processes that rely on interaction between a current and the medium that carries the current, and of eliminating asymmetries that can lead to scaling or premature wear in batteries and other electrolytic systems.
		The medium that carries the multi-dimensional currents may be an electrolyte, gas, gel, semiconductor, or any other medium capable of carrying current between two electrodes, and having at least two dimensions so as to enable variation in the current direction.
		Multi-directional currents are generated in a medium by cyclically reversing the direction of a conventional current applied to at least one of at least two electrodes so that an electromotive force (EMF) pulse travels from side of the electrode to the other, changing the direction of current in the medium.
	peswiki.com /index.php/Directory:Sully_Direct_Current (2799 words)

	direct current -- Encyclopædia Britannica
		Direct current is produced by batteries, fuel cells, rectifiers, and generators with commutators.
		Direct current was supplanted by alternating current (AC) for common commercial power in the late 1880s because it was then uneconomical to transform it to the high voltages needed for long-distance transmission.
		Current interest in eugenics involves studying the nature and causes of genetic defects, the ways in which psychological traits are determined, and the relationship between environmental factors and heredity, as well as a variety of related ethical, legal, and social issues.
	www.britannica.com /eb/article-9030595 (849 words)

	Direct current - Open Encyclopedia (Site not responding. Last check: )
		Direct current (DC or "continuous current") is the continuous flow of electricity through a conductor such as a wire from high to low potential.
		Direct current was used originally for electric power transmission after the development by Thomas Edison of the commercial generation of electricity in the late nineteenth century.
		It has mostly been abandoned for this purpose in favor of alternating current (discovered and promoted by Nikola Tesla, see War of Currents), which is much more suited to transmission over long distances.
	www.open-encyclopedia.com /Direct_current (315 words)

	Electric current Summary
		The SI unit of electric current is the ampere (A), which is equal to a flow of one coulomb of charge per second.
		The most familiar artificial form of electric current is the flow of conduction electrons in metal wires, such as the overhead power lines that deliver electrical energy across long distances and the smaller wires within electrical and electronic equipment.
		It is the current that passes that determines the effect, and this depends on the nature of the contact, the condition of the body part, the current path through the body and the voltage of the source.
	www.bookrags.com /Electric_current (2337 words)

	The Third Electrical Current
		Direct Current (DC), the kind that comes from your battery in your automobile, was discovered by Ben Franklin in the 1700’s.
		Alternating current is described as electric current that flows for an interval of time in one direction and then in the opposite direction; that is, a current that flows in alternately reversed directions through or around a circuit.
		Direct current is described as electrical current that flows in one direction, and does not reverse its polarities as alternating current does.
	pesn.com /2006/06/12/9500280_New_Electricity_SullyDC (1085 words)

	ALTERNATING CURRENT
		In direct current electricity, electrons flow continuously in one direction from the source of power through a conductor to a load and back to the source of power.
		Current is constant in DC, except when the circuit is turned on and off, or when there is a load change.
		Current is delayed depending on the mount of inductance.
	www.geocities.com /vijayakumar777/electricity/electricity.html (3112 words)

	alternating current (AC), direct current (DC)
		AC current is a specific type of electric current in which the direction of the current's flow is reversed, or alternated, on a regular basis.
		Direct current is no different electrically from alternating current except for the fact that it flows in the same direction at all times.
		Alternating current was chosen early in the 20th century as the North American standard because it presented fewer risks and promised higher reliability than competing DC systems of the day.
	www.energyvortex.com /energydictionary/alternating_current_(ac)__direct_current_(dc).html (466 words)

	[No title] (Site not responding. Last check: )
		During the forward polarity pulse, a larger current flows to the anodizing part and the resultant anodizing reaction generates a high density covering of gas bubbles on both the cathode and the part.
		During the reverse polarity pulse, a small current flows to the cathode and as a result, gas bubbles are discharged both from the cathode and the anodized coating itself.
		Unfortunately, direct current couldn't be sent more than a few blocks; most users had to have their own noisy generator.
	www.lycos.com /info/direct-current--miscellaneous.html (410 words)

	Bearing fixed assembly in a direct current fan - Patent 6700257
		The present invention relates to a bearing fixed ASSEMBLY in a direct current fan, and particularly to an improvement of bearing fixed device in a direct current fan, which provides a closed type oil chamber to enhance the function the bearing in the fan.
		A bearing fixed assembly in a direct current fan according to the present invention comprises a spindle, an oiled bearing, a washer, a retaining ring, and an inner ring to form a closed type oil chamber.
		A further object of the present invention provides a bearing fixed assembly in a direct current fan, which has a closed type oil chamber with a design of leakage proof, so that no component part thereof is contaminated and a label on the fan is unable to come off the fan too.
	www.freepatentsonline.com /6700257.html (1306 words)

	DIRECT CURRENT - Definition (Site not responding. Last check: )
		\Direct current\ (Elec.) (a) 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}.
		(b) {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.
	www.hyperdictionary.com /dictionary/direct+current (73 words)

	Direct current (Site not responding. Last check: )
		In direct current, the electriccharges flow always in the same direction, which distinguishes it from alternating current (AC).
		Direct current installations usually have different types of sockets, switches, and fixtures, mostly due to the very lowvoltages used, from those suitable for alternating current.
		It is usually extremely important with a direct current appliance tonot reverse polarity unless the device has a diode bridge to correct forthis.
	www.therfcc.org /direct-current-70353.html (285 words)

	PHY 207 Chapter 28 Direct-Current Circuits / Dr. Miner
		Here V is the terminal voltage (measured between the twoterminals), emf is the true emf of the battery, I is the current being drawn from the battery, and r is the battery's internal resistance.
		We select the value of that small resistance so as to have the current for full scale deflection of the galvanometer be the value for full scale deflection of the ammeter.
		If it is not to change the circuit noticeably, it must have a very high resistance so that the current drawn through it is negligible relative to that drawn through the resistor across which the voltage is measured.
	campus.udayton.edu /~physics/gkm/p207ch28.htm (2072 words)

	Neutral direct-current telegraph system (Site not responding. Last check: )
		In telecommunication, a neutral direct-current telegraph system (single-current system, single-current transmission system, single-More system) is a telegraph system in which (a) current flows during marking intervals and no current flows during spacing intervals for the transmission of signals over a line, and (b) the direction of current flow is immaterial.
		direct current neutral neutral density filters telegraph belfast telegraph daily telegraph sunday telegraph telegraph apparatus manufacturers telegraph fantasy football current current time current issues current issue
		Directive Interactive Council Elite Neutral guild of ambassadors, negotiators, and advisors.
	www.serebella.com /encyclopedia/article-Neutral_direct-current_telegraph_system.html (455 words)

	Chapter V: System of Electrical Supply (Site not responding. Last check: )
		The current delivered by these alternators reverses its direction fifty times per second and in connecting dynamos just coming into service with those already in operation the allowable difference in phase relation at the instant the circuit is completed is, of course, but a fraction of the fiftieth of a second.
		at full load) in the form of direct current at a potential of 625 volts to the bus bars of the direct current switchboards, from which it is conveyed by insulated cables to the contact rails.
		The three conductor cables which convey tri-phase currents from the power house are carried through tile ducts from the manholes located in the street directly in front of each sub-station to the back of the station where the end of the cable is connected directly beneath its oil switch.
	www.nycsubway.org /irt/irtbook/ch5.html (5413 words)

	Direct Current (Site not responding. Last check: )
		A direct route or service is the one that goes between the start and endpoints without diverting to a third location en route.
		Direct current is an continuous flow of electricity.
		Mars Direct is a proposal for a relatively low-cost manned missionto Mars.
	www.moviewavspage.com /sand/28859-direct-current.html (247 words)

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