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Re: To Settle an Argument
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Posted by Glenn on August 27, 2000 at 14:28:38 from (209.253.184.84):
In Reply to: To Settle an Argument posted by Wardner on August 26, 2000 at 20:54:02:
This is what we were taught in college(FWIW): Think of electricity traveling through a wire like water traveling through a pipe. Voltage can be considered the same as water pressure in the pipe. Amperage can be considered equivalent to volume of water in the pipe, and wattage can be considered the same as the amount of work a given amount of electricity(wattage=voltage x amperage) can d(like water going over a waterwheel). That being said, a battery can make 12v(pressure) but not have enough volume of current(amperage) to do the work. Consider a waterwheel: you could have water at 100 PSI(voltage) coming out of a 1/2-inch pipe(volume) flowing over the wheel; while the pressure is high, the total water volume is so low(amperage) that it cannot turn the wheel due to the wheel's size. However, a large amount of water(like a steady-flowing stream or creek) can turn the wheel in spite of the low pressure because the sheer volume of water makes up for the low pressure. This is a very simplified example, but it gets the point across. This is also why a 6v system must receive regular maintenance to be able to do its job, as pointed out by the other posters. Since a 6v system has lower pressure(voltage) to begin with, it must be maintained to keep the volume(amperage) of the electricity high enough to turn the starter(i.e. waterwheel). Hopefully, I didn't bore you with this tome!
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