100ma how many volts?
360215
The unit ma (correctly written as mA) is a unit of current, not voltage.\n\nTo be perfectly technical, mA refers to miliAmps, where as MA refers to MegaAmps.  1 MegaAmp = 1 billion milliAmps.I can only assume your meant mA since you would have to have one huge solar panel to be outputting MegaAmps of current.\n\nAlthough there is a releationship betweent electrical current and the voltage in a circit as given by ohms Law,\nV = R * I,\nyou cannot use it in this case to determine voltage.\n\nYour best bet to figure out the voltage output in your solar panel would either be to look at the documentation (if any), or just get out a voltage meter and measure it directly.
734859
Divide by the voltage and multiply by 1000.\n\nIf you are working with 3 phase power, divide again by sqrt(3)
904869
amplification by billion volts!
63294
Watts = Volts * Amps\n\nSo if you have amps, multiply it by the voltage (if it's a standard electrical device for the home, the voltage is 120 Volts) to get watts.\n\n1000 Watts = 1 kilowatt
254527
1.85 ohms. The first answer is correct
407235
the highest electric volt ever recorder is approximately 100,000,000 volts
910217
There are two issues to consider, cable heating and voltage drop.  Of the two, voltage drop is by far the easiest.  You need to determine what the allowable voltage drop in you cable is.  The voltage drop is just I x R where I is the current and R is teh round trip cable resistance.  The specification of 100 kW isn't enough.  If its a high tension 100 kV line, the current is only 1 amp and a run of 16 AWG wire would deliver about 99,999 volts out of the original 100,000 volts to your load.  If its a 100 volt system then a 4 AWG wire would only deliver only 20 volts to the load.  \n\nThe formula for wire resistance (in AWG) is that 10 AWG has 0.001 ohm/ft.  Each increase of 1 in the gauge increases resistance by the cube root of 2 (about 25%).  You calculate by picking what voltage drop you can live with, for the known current figure the resistance, knowing the length figure the resistance per foot, and then pick the AWG using the above.\n\nThe second concern is wire heating.  Although you could do the heat transfer calculations, instead look up the allowable ampacity for any wire in an electrical engineers or NEC handbook.
416798
105W\n\nA transformer changes the voltage, but inversely alters the current to the same degree. Therefore, using P=VI, the power is always the same.
158725
PS--just to add a bit of info, a commercial radio or TV system will be running on 480 VAC three phase or higher (577 for example).  When you talk about three phase power, the current is divided amongst three wires, so 100 KW is not such a big deal anymore.  The older AM stations will all be running anode voltages of a couple of KV or more, so the power supply has no problem having high voltage on the input.\n\nTo supply a 100,000 Watts, a 480V AC system will send about 69 1/2 Amps per phase into the load.  A 480V 3phase system rated at 200 Amps/phase can supply 288,000 Watts continuously (which for you motor heads converts to 386 1/2 electrical Horsepower).
261103
10 amps if the voltage difference is 120 volt as usual
787963
Actually no. I think there is about 5 volts DC. I guess the amount of power available depends on the computer, but it's probably very small. Maybe less that 500ma.
399258
just put a limiting resistor. 60mA and 12V. Limiting resistor =R=(V-Vled)/I. assuming the extreme, 0V for Vled. R=12/6e-2=200ohm. that way the current will never exceed 60mA.
820466
The voltage across each resistor will be 12 volts as each is effectively directly connected to the battery.\nIt is the current flow through the resistors which will be different.\nVolts/Ohms =Amps - that is\n12/7 amps or 12/5 amps now get your calculator out!\nRoyS
644717
Rearranging the equation watts=volts*amps to solve for amps gives:\namps=watts/volts\nFor example, 1,200 watt hair dryer on the regular household voltage of 120V uses 10 amps.\nBe aware that your A/C may run on 220V or 240V, so check the data plate before calculating.\n\nAlso be aware that inductive devices like the electric motors in your A/C may have a power factor other than 1, but I would ignore that if I were you, because I find it confusing. If you don't want to ignore power factor, here are a couple of links.
1086026
You can get an idea on counting the discs on the insulator string and multiplying by 12kV/disc.\nAgain it is only a general rule of thumb and is not accurate.\n\nSource 50 years as an Electrical Engineer
1177002
yeah you can use a switch (voltage switch) or if you can use binary logic, need to know how much voltage/current you are dealing with
1130014
V=IR\n\nWire 1:\n50 = 2 * R1 => R1 is 25 ohms\nCurrent = 2 amps\npower = V*I = 2*50 = 100 watts\n\nWire 2: \n100= 2* R2 => R2 = 50 ohms\nCurrent=2amps\npower = V*I = 100*2 = 200 watts\n\nare you looking for ratios when you say "compare" ?\nif yes: ratio of resistances is  1:2\nratio of currents is 1:1\nand ratio of power is 1:2