2006-07-20 06:59:02 · 7 answers · asked by Tonto 2 in Science & Mathematics ➔ Physics
It is direct current, not dual current.
An alternating current (AC) is an electrical current whose magnitude and direction vary cyclically, as opposed to direct current, whose direction remains constant.
Direct current (DC or "continuous current") is the constant flow of electric charge from high to low potential.
2006-07-20 07:08:15 · answer #1 · answered by Icy U 5 · 0⤊ 0⤋
The difference between AC (Alternating Current) and DC (Direct Current) is that the AC voltage oscillates, on purpose, at a set rate, with respect to time, and DC doesnt.
That tells you what it does, but not why it does it.
Power=Voltage*Amperage
Voltage Loss = Amperage * Resistance
Power Loss = Voltage Loss* Amperage = Resistance * Amperage^2
The power loss is a function of the square of the amperage. If you double the amperage, you quadruple your power loss. For transmission purposes higher voltage is better... because it means lower amperage and lower loss. Heavy Duty power lines carry electricity at high voltage, like 20,000 Volts. Your wall socket isnt 20,000 volts, its 120. Thats because a transformer can efficiently change the voltage & amperage of AC .. so you can ship the electricity at 20,000 volts then run it through a transformer to get it down to a lossy, but much more easily used form.
I hope that helps.
2006-07-20 07:16:14 · answer #2 · answered by Curly 6 · 0⤊ 0⤋
If you mean alternating current and direct current=ac&dc
alternating current in the U.S.A. cycles 60 times a second, that means that that light bulb is turning on and off 60 times a second,too fast for your eyes to tell. And direct current,as in your car,flashlight and other battery operated things stay on with no pulses,got that?
2006-07-20 07:09:56 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Direct current requires a ground potential or a negative side to be purposeful or deliver electromotive force. Alternating Current is delivered as a cycles per second sine wave (generally) peak to peak voltage.
2006-07-20 09:48:17 · answer #4 · answered by Ron K 3 · 0⤊ 0⤋
Maybe you are thinking of dual circuits- where the voltage in one circuit has the same form as the current in another.
2006-07-20 08:39:02 · answer #5 · answered by Fred S 2 · 0⤊ 0⤋
Are you talking say +15 volts DC on one side of a circuit and -15 volts DC on the other? Vs Say 30 volts AC? I'm assuming 30 Vac rms. Off the top of my head......not much. LOL
If your talking AC vs DC that's different. See below for your answer.
2006-07-20 07:08:11 · answer #6 · answered by TommyTrouble 4 · 0⤊ 0⤋
probably a switch cause I don't know what a dual current is... Its probably when the bus veeres off the road and crashes on tour, delaying the concert!
CAUSE I'M A BLONDE...YEAH YEAH YEAH!
2006-07-20 07:34:12 · answer #7 · answered by laurameetsworld 2 · 0⤊ 0⤋