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Two theories - Electron and Hole
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Posted by jdemaris on February 13, 2006 at 05:37:59 from (66.218.22.36):
In Reply to: battery polarity posted by SKane on February 13, 2006 at 04:06:28:
Generally speaking, neither system is better- or worse - than the other. There are two competing theories about the flow of electricity, each the opposite of the other - i.e. The Electron Theory (negative to positive flow) and the Hole Theory (positive to negative flow). The Hole Theory has sort of taken a back seat when influencing everyday circuitry. Fifty years ago, they both had equal merit, so adherance to one theory led to building systems with postive ground, and belief in the other led to systems with negative ground.
When the use of transistors and other related semi-conductors became popular, a standard had to be developed, and the standard in most cases is the Electron Theory. Thus the negative-ground standard.
There has been a lot of testing over the years, especially with corrosion control, and in some cases, it has been proven that positive ground works better than negative. And of course, the converse is also true.
None of these theories have been completely proven or disproven, and they are constantly being added to. The Hole Theory by some guy named Dirac, is often referred to now as the Conventional Theory. And, the newer Quantum Field Theory is pretty close to it.
Our tractors don't give a d*mn.
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