Current, as it applies to water, wind etc. requires a direction AND a
speed. -- Mike, WV2ZOW
On Dec 9, 2016 6:23 PM, "Bill Turner" <dezrat@outlook.com> wrote:
> On Thu, 8 Dec 2016 20:41:40 -0700, Jim wrote:
>
> >Hey Bill, Why're you picking on me? I'm just the messenger, here! Really,
> >I'm not making this stuff up. What I've said is what the entire scientific
> >community believes, and also virtually every electrical engineer who
> didn't
> >cheat on his college exams.
>
> At one time the entire scientific community believed the earth was
> flat, there were only four elements, the sun revolved around the earth
> and disease was caused by "vapors".
>
>
>
> >Movement is not a real
> >substance, and neither is electric current. Current is an abstraction.
> Like
> >I said earlier, you can't weigh it on a scale, or hold it your hand, like
> >you can with real particles.
>
> Current is not an abstraction. It is measured in cubic feet per second
> for water, miles per hour for air and amperes for electricity.
>
> >Fo rexample, if you measure the plate current flowing from your HV power
> supply
> >through a copper wire into the plate cap of your 3-500Z linear amp, your
> >plate current meter is actually measuring the magnetic field caused by the
> >charges moving in the copper wire.
>
> Not necessarily. You could also measure the voltage drop across a
> resistor using a digital volt meter. No magnetics involved.
>
>
> >Furthermore, you can't tell from the plate current measurement whether the
> >charges in the wire are positive charges moving up the wire, or negative
> >charges moving down the wire.
>
> Positive charges don't move through a wire. Protons don't move through
> wires nor to positively charged ions. Only electrons. Protons and ions
> can move through a vacuum, but not through a wire.
>
>
>
> That's why current is such a useful concept:
>
> I agree there are concepts which may be useful but which are still
> wrong. For example when learning celestial navigation it is easier to
> assume the sun revolves around the earth than to grasp what is
> actually happening, and either way the end result is correct, but that
> doesn't make it true, just like "conventional current".
>
> 73, Bill W6WRT
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