Published on 29th April 2005 by
Matt Jason H
Originally Posted by HippoGood beginners guide, I cant wait for the section on Thevenin and Nortons theorems :D
Originally Posted by g0thIn the majority of cases, current flowing through solid metals, or graphite, etc, the sole charge carriers are electrons.
Originally Posted by nleahcimCorrect.
That still doesn't change the fact that current is the measure of postive charge flow.
Originally Posted by g0thYeah, you're talking about 'conventional current', which is one of the Stupidest Things Ever.
Originally Posted by acrimoniousThanks for taking an interest.
I see where you're coming from - but positive charge arises due to electrons flowing in the opposite direction. The more electrons flow, the greater the 'positive charge flow' and so the greater the current.
In some respects I am wrong to say that electricity comes about due to electrons as electricity can arise due to proton flow in liquid metals - however I'm just going to be working with Molexs, not mecury, so for the first part of the guide at least, I think this level of understanding is far more than enough. ;)
Originally Posted by nleahcimIt may seem stupid, but it's also the standard convention.
I don't agree. People should learn the right thing first, not be taught a half right thing and then later be expected to figure out what is actually going on. You're just going to get people confused if you tell them something that is blatantly wrong.
Originally Posted by acrimoniousI honestly think that calling a two page article about the basics of electricity "blatantly wrong" for not highlighting the phenomenon of proton or atom currents is being every so slightly pedantic.
If someone gets confused in the course of following these basic electromodding articles due to this omission I'll paypal you a beer. ;)
Originally Posted by nleahcimWhy not just say positive charge, instead of electrons? Then the guide would be right, and newbs would actually have the right idea, somewhat. The problem is if they look at another tutorial - there's a very good chance they'll get confused as it probabaly will reference the flow of positive charge. I'm actually quite surprised that you are arguing against me on this... You're just going to confuse newbs worse if you tell them something that is wrong, IMHO.
I'll be expecting that beer soon. Blue moon would be good, but a Guinness is acceptable as well :D
current Symbol: I; unit: ampere. A flow of electric charge or, quantitatively, the rate of flow of electric charge. A conduction current is a current flowing in a conductor due to the movement of electrons or ions through the material, usually under the influence of an applied field. The net current is the algebraic sum of the charges. >>displacement current.
A unidirectional current is one that always flows in the same direction in a circuit. A unidirectional current of more or less constant magnitude is a >direct current. >>alternating current.
Current (symbol: I). Current is the rate of flow of electric charge past a point. The unit of measure is the ampere, or amp, with currents usually expressed in amperes (A), ...
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