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


"Don Kelly" <dhky@xxxxxxx> wrote news:byygk.120334$gc5.52565@xxxxxxxxxxxx
----------------------------
"Szczepan Bia³ek" <sz.bialek@xxxxx> wrote in message
news:g5s47l$u8$1@xxxxxxxxxxxxxxxxxxxxxx

"Don Kelly" <dhky@xxxxxxx> wrote news:eCegk.80623$kx.31119@xxxxxxxxxxxx


However you can't get a positive stroke to ground (which exist) out of
"negative stroke cloud-ground-next cloud" by any twist of illogic.

Here are details: http://plaza.ufl.edu/rakov/ICLP2000/positive1.16.pdf

Thank you for the reference. Please note that this article considers
positive, negative and bipolar strokes. It doesn't say what you claim.

They wrote that at Empire State Building no transfer of positive charge.
And "less than 5%" may means zero.

By the way, I have met, and knew, professionally, one of the authors
cited.(Janischewski) who, I admit freely has more knowledge of lightning
than I have. He had criticism of the Alberta data- not the polarity
information but the accuracy of the current magnitudes and had
suggestions for improvement. I was not familiar with the bi-polar aspect
but that doesn't support your position- nor does the rest of the paper.
As for the rest of what you say, there is a minim of truth therein.
However, you simply claim that there is an excess of electrons on the
surface of the earth. Whether or not this is true is not of concern when
you consider earth-cloud relationships. Given that your contention is true
then one can consider that some regions are more or less negative (with
respect to ???). With respect to Mount Everest, then all locations on
earth are more or less negative. So what reference do we consider as 0 on
our scale? Some unknown location in far space? The ionosphere?

Again victim of math. If drop is neutral the voltage is zero.

If, as we generally do, we use earth as the reference, then some regions
in clouds are positive and some are negative with respect to earth.

Clear air (where always is the excess of electrons) is always positive with
respect to earth. Clouds (and all their regions) are always negative.
Measurements of the Earth electric field are made for ages.

The direction of electron flow (ignoring the real possibility of positive
ion movement) in any current to earth will be dependent upon this.

You have now come from trying to express positive discharges to earth as
part of a negative cloud- earth-cloud discharge to trying to produce your
own terminology that is not defined for all but varies as it suits your
purpose.

I understand actual terminology (it is not mine). Some of us not. It is
important to know that in air and on some bodies is the excess of
electrons, especialy for that who are fascinating with rotating bodies
effects. It is usefull to now also that the excess is material dependent
(triboelectric series). The effects are strongest with rotors made of
teflon.
S*




.

Relevant Pages