Raphanus wrote:
>
> So the relevance of the dimensions you gave is....?
>
The relevance of the lathe iron shaving dimensions is the density. The
Capacitor Current
is weak in a small Wimshurst and small VandeGraaff and so a typical
small magnet
will be too dense to show a Meissner Effect. So I had to resort to
making my own
smallest density magnet. A lathed iron shaving that is in the form of
a coil or extended
spring shape serves the purpose. It is less than 1/10 gram and
occupies a large area
so the density is tiny.
> Current is just the motion of electrons. The two types that one
> normally encounters is AC ( out of the wall socket) and DC (out of the
> car battery) but the variation of current with respect to time can
> have any shape - hence there are INFINITE TYPES of current. If one
> does a Fourier analysis of the current you will find that ALL currents
> are a combination of DC and a frequency spectrum of AC. If one
> charges up a capacitor, the initial flow of electrons is high and then
> the current magnitude decays exponentially with time and one will find
> that the frequency spectrum has an infinity of components. You detect
> something other than this? What is CC?
>
I wish it were as simple as current as the motion of electrons. But it
is not
that simple. Flow of electrons is only one aspect of current. There is
another
aspect that is just as im****tant if not more im****tant and that is
what can
be called "messenger photons". In AC, it is not the motion of
electrons
that tells the electron at the opposite end of the wire to begin to
move. In
AC we picture the electrons as going forward then backwards, forward
then backwards. So motion or flow of electrons is only part of the
story
of a current.
And in the Halliday & Resnick definition of electric current, they
acknowledge
that electron motion is only part of the definition.
So the "Messenger Photons" in AC are different from that of DC and
different from
that of CC.
So the definition as given by Halliday and Resnick, Fundamentals of
Physics, 3rd
edition, 1988, on page 641
dq = i dt (definition of current)
is wholefully lacking the parameter of "messenger photons"
Archimedes Plutonium
www.iw.net/~a_plutonium
whole entire Universe is just one big atom
where dots of the electron-dot-cloud are galaxies
|
