Re: Error in Wikipedia article: Faraday's law of induction


<phil-news-nospam@xxxxxxxx> wrote news:g5mchp117hq@xxxxxxxxxxxxxxxxxxxx
On Wed, 16 Jul 2008 09:51:51 +0200 "Szczepan Bia?ek" <sz.bialek@xxxxx>
wrote:
|
| "Don Kelly" <dhky@xxxxxxx> wrote
news:OTefk.110294$gc5.47073@xxxxxxxxxxxx
|> >
|> It's a bit more than this simplistic and superficial approach.
|> To get a high voltage between two points, it is NECESSARY that there is
a
|> charge separation.
|
| No. Assume that you have very small cloud composed of 10 small charged
| drops. Between the cloud and the Earth is some voltage. If the drops
join
| together the voltagr rise.

Same total charge in Coulombs. Same distance in meters. Same potentin in
Volts.
What is it that you are changing to raise the voltage?

The ratio Q/C
In physics is the equation: C = Q/V. So we have:
1. For 10 drops: Let assume that the voltage on each is 1 V and Q is 1
electron and C is 1,
2. For one large drop: V = Q/C but now Q is 10 electrons and C is
proportional to the new radius of large drop. The new radius is 10^-3 bigger
so the C also. In rsult we have: V = !0/10^-3 = 100V. I have used the
theoretical equations. In reality is 10V.


|>This separation of charge
|
| In contemporary science the separation of charge is used in place of
| build/lowering of voltage. Current flow from high voltage to lower. Not
from
| more charge to less.

The voltage is a difference between two points.

The second is the Earth. But you can have many charged particles in the air
with the same voltage. If the voltage is diferent current or sparks start
between them.


|> is the cause of the voltage difference- look at the definition of
|> potential difference. Updrafts, wide temperature ranges, and charge
|> separation due to changes in temperature followed by freezing are some
of
|> the factors.
|> Suffice it to say that there are parts of a cloud that are negative
with
|> respect to earth and parts which are positive due to charge buildup.

It is impossible. All parts are negative but the voltage may be diffrent.
|
| Are you talking about voltage?
| All parts of clouds have excess of electrons.

Maybe the whole planet has an excess.

Without any doubts.
Or the whole solar system. Or ...

| Meteorology is a new science. Physics is older. Lightnings folows the
| physics laws. Meteorologist should read physics.

They do.
But they use their own terminology. In physics negatively charged means
excess of electrons. Positively deficit. In a cloud no drops with deficit of
electrons.
S*



.

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