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Electricity

Electricity - Physics Forum

Electricity - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.


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  #11  
Old 06-03-2008, 02:17 AM
gdewilde@gmail.com
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Default Electricity

On Jun 2, 4:05 am, BURT <[Only registered users see links. ]> wrote:

Electricity is just magnetism

...or magnetism is just electricity

magnetism is just radio

...or light is just magnetism

Or electrogravitism is the same as radioluminance

Simple enough?

More info:

Colorado Springs Gazette (9 Jan. 1901), p. 7, col. 6,7,8; ibid. (9
March 1901), p. 4, c. 2.
Electrical World (4 April 1896), p. 369: "Is Tesla to Signal to the
Stars?"
Mountain Sunshine (Denver, CO) 1(1): 31-34 (1899).
English Mechanic & World of Science, #2228 (5 Dec. 1907)
New York Evening Post (22 Jan.1919), p. 14, c. 4, 5.
New York Sun (Thurs., 3 Jan. 1901); ibid., (12 July 1937), p. 6.
New York Times (23 May 1909), p. 10, c. 6, 7.; ibid. (3 Feb., 1919);
p. 14, c.3: "Celestial Movies"; ibid., (3 Sept. 1921), p. 4, c. 4.;
ibid., (11 July 1937), p. 13, c. 2.
New York Tribune (12 Jan .901), p. 2, c. 3.
Pyramid Guide 4 (3):1 (Jan.-Feb. 1976); ibid., 5(2):5 (Nov.-Dec.
1976); "Letter From Tesla" (6 Jan. 1900).
Tesla, N., Collier’s Weekly (March 1901), p. 359-361; "Talking With
the Planets"
Tesla, N., Current Opinion (March 1919), p. 170-171; "That Prospective
Communication with Another Planet"
Tesla, N., "Electrical Communication with the Planets" in Thompson,
S.P.: Polyphase Electric Currents & AC Motors; 1902, Collier & Son,
NY; p. 234-236;
Tesla, N., Harvard Illustrated Mag. (March, 1907), p. 119-121;
"Signaling to Mars" Tesla, N.: New York Herald (12 Oct. 1919), p. 7;
"Signals to Mars..."
Time (20 July 1931), p. 27.
Lawrence, L.G.: "Interstellar Communications Signals"; Borderlands
52(1):27-29 (1996)
Hodowanec, Gregory: Rhysmonic Cosmology (H18-HG3/$6); ibid., Rhysmonic
Cosmology Notes (H17-HG2/$4); ibid., Rhysmonic Cosmology Collected
Papers (H19-HG4/$8); ibid., Rhysmonics Articles (H21-HG6/$4); ibid., G-
Wave Detectors (H16-GH/$7); ibid., GWD Circuits (H20-HG5/$7); ibid.,
Rhysmonics Updates (H22-HG7/$4). Published by: Rex Research, P.O. Box
19250, Jean NV 89019; Catalog: $2.
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  #12  
Old 06-07-2008, 02:40 AM
The Ghost In The Machine
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Default Electricity

In sci.physics.relativity, BURT
<[Only registered users see links. ]>
wrote
on Sun, 1 Jun 2008 19:05:06 -0700 (PDT)
<[Only registered users see links. ]>:

Haven't worked with semiconductors much, have you? :-P

To be brief about it: it is possible to "dope" a piece of
crystalline silicon so that it has an excess of electrons;
such electrons would behave much as one might expect,
and allow the doped silicon to carry a current.

It is also possible to "dope" another piece so that it
has a *deficiency* of electrons; this piece will also
conduct electricity.

Now join them together. What happens? Many interesting
things, especially when a third one comes along for the
ride (and the second one is relatively thin).

Or one can dope two regions in a piece of crystalline
silicon, then overlay that piece with a thin glass (SiO2)
layer, then overlay the area between the two doped regions
with a metal or polycrystalline silicon conductor.
When holes are etched in the glass to touch the doped
regions, and additional metal attached thereto, presto:
a MOSFET device.

Such, vastly oversimplified, is done daily in clean rooms
to produce the devices you're typing on right now. ;-)
The actual devices can currently be as small as a tenth
of a micron, or even smaller.

One can also replace the silicon with more exotic materials
such as gallium and arsenic. The diode junction then can
even produce light -- logically enough, the result is a
light-emitting diode, or LED for short.

I'm not *that* expert in the details of wafer processing
(I was on the software side) but I know the basics.

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  #13  
Old 06-07-2008, 03:16 AM
BURT
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Default Electricity

On Jun 6, 6:40*pm, The Ghost In The Machine
<[Only registered users see links. ]> wrote:

Why are you into all this dope?
An atom missing an electron is an ion right?

That ion would try to keep the electrons that flow through it.


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  #14  
Old 06-07-2008, 05:46 PM
The Ghost In The Machine
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Default Electricity

In sci.physics.relativity, BURT
<[Only registered users see links. ]>
wrote
on Fri, 6 Jun 2008 20:16:20 -0700 (PDT)
<[Only registered users see links. ]>:

"Dope" is the term used in the industry. One might also
use "impregnation", I suppose, or refer to the process
("sputtering").

For example, one might use aluminum and phosphorous
to define P and N regions on a silicon wafer, cut
from a silicon crystal. (Actually, the wafer is
pre-doped with phosphorous as it turns out, if I
understand the processing correctly.)


Correct, and because of the crystalline lattice, the missing
electron actually acts as though there were a positive charge,
termed a "hole". I'm not sure what the pseudomass of the
hole is offhand (it probably depends on the density of holes
in the lattice -- which depends on the amount of impurity).


For a time, yes.



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important, it's the ability to DO something
with it.
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  #15  
Old 06-07-2008, 07:47 PM
mitch.nicolas.raemsch@gmail.com
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Default Electricity

On Jun 7, 9:46*am, The Ghost In The Machine
<[Only registered users see links. ]> wrote:

You mean the charge one the the protons of the nucleus isn't canceled.


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  #16  
Old 06-07-2008, 09:39 PM
The Ghost In The Machine
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Default Electricity

In sci.physics.relativity, [Only registered users see links. ]
<[Only registered users see links. ]>
wrote
on Sat, 7 Jun 2008 12:47:45 -0700 (PDT)
<[Only registered users see links. ]>:

Correct.



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