new Ohms Law(lol)
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new Ohms Law(lol) I think this guy totally messed up Ohms law.Voltage goes down and amperage goes up? I dont think so(lol). http://www.trineonline.com/interior/...lectronics.htm
The last time I checked. I=E/R If voltage goes up and resistance stays the same amperage goes up.
The last time I checked. I=E/R If voltage goes up and resistance stays the same amperage goes up.
Last edited by lovescamaros28; Jul 15, 2009 at 08:48 PM.
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In a series circuit, the voltage drops/divides and the current stays the same. The voltage dropped/divided equals the voltage supplied.
In a parallel circuit, the current drops/divides and the voltage stays the same. The current equals the current supplied.
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In a parallel circuit, the current drops/divides and the voltage stays the same. The current equals the current supplied.
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See this: http://www.hvacwebtech.com/Ohm's%20Law.htm
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He's right, if you change one of the terms of Ohm's law. Try P=EI where P=power (watts). Or, to put it into context - to maintain power with reduced voltage, current has to go up.
See this: http://www.hvacwebtech.com/Ohm's%20Law.htm
See this: http://www.hvacwebtech.com/Ohm's%20Law.htm
Last edited by lovescamaros28; Jul 17, 2009 at 06:55 PM.
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Exactly...Eventhough the voltage does drop across each load in a series circuit,the amperage(current) remains the same throughout.Amperage never does increase with a decrease in voltage though.
Talking about AC powerline transmission, that is a different thing or even an AC circuit for that matter. The voltage is inversely proportional to current. Like a transformer for instance.
Step up voltage transformer: step down current.
Step up down transformer: step up current.
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On the otherhand here's another perspective.
http://www.hobbyprojects.com/ri_in_A...C_circuit.html
Like said in that link, the voltage has to be RMS or peak.
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http://www.hobbyprojects.com/ri_in_A...C_circuit.html
Like said in that link, the voltage has to be RMS or peak.
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From Summit, SUM-820323 12v DC 1.9hp. Other specs not stated. We all know that starting current can, depending on conditions, be well over 100 amps.
Also note that this motor would be fed with a #4 or #6 cable to accomodate those conditions. Duty cycle is maybe 10%.
To feed the Grainger motor, all that would be needed is #12 wire to keep it happy at full load, 100% duty cycle.
I'll note that the differences here are .1 horsepower. Both are DC motors. As the supply voltage went up, the current requirement went down.
You see the same differences in AC circuits, depending on what you are trying to accomplish. Look at the current requirement differences between equivalent cooling capacity 110v and 220v air conditioners.
Go back to the link I posted previously, and go to the bottom of the page to see ALL the permutations of Ohm's Law.
Last edited by fleetmgr; Jul 18, 2009 at 12:24 AM.
