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.
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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).