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by _dain_
1265 days ago
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>Current is always measured through a single point. It's a count of the charge flowing past a point per time unit. (What is charge? No one knows. "Charge" is just a name for the mysterious something that "voltage" is a difference of...) I think you're being overly mysterious here. It's the number of electrons passing through the wire per second. And charge isn't the thing that voltage is a difference of; it's potential difference, as in electric potential energy. The "water in a pipe" analogy really isn't that bad; it's gravitational potential instead of electrical potential, and amount of water instead of amount of electrons. |
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Maybe, but I feel electricity is mysterious, eh? I mean, we don't know what it is, nor why the Universe has it, and we aren't likely to ever figure it out, eh? Really that's all I was trying to point out with that: we know how electricity behaves but we don't know what it is. Sometimes people get hung up on that.
In any event, I usually recommend William Beaty's 'What Is "Electricity"?' http://amasci.com/miscon/whatis.html