Originally posted by: ViperMagic
I'm not to good with electricity past ohm's law, so bear with me. Say I have a power source, 12v and about 400A. Is there anything I can run the current through, so I get really low amperage (~.5A) and a rediculous amount of voltage (300,000v or thereabouts)? Thanks
no you cannot. it is physically IMPOSSIBLE to do what you are doing since it violates the laws of thermaldynamics.
Power = Current * Voltage
(watts = amps * volts)
your source: P = 12V * 400A = 4800 W
your goal: P = 300,000V * 0.5A = 150,000 W
you need a source that can generate at least 150,00 Watts of power. that's a lot of power btw. and some considerations have to be made if you're doing AC or DC current.
note: high amp (400A is high) requires very thick wires. high voltage (300,000 V is very high) requires very thick\expensive insulation.
what you are attempting should not even be done unless you're an electrical (power) engineer and an experienced electrician.
if your voltages and currents were more reasonable, you can use a transformer (step up to increase voltage relative to source, step down to decrease voltage relative to source).