🚀 go-pugleaf

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Thanks for viewing this massage. Hope you'll be kind enuf to help me out of
this situation

Please, if possible, help me re- explain what is he saying!!!!

  I have a problem understanding what the teacher is explaining when it
comes to electric current.  He defines p.d as the energy converted from
electrical to other forms when 1 coloumb of charge passes between two
circuit, 

volt as the potential difference between 2 points in a conductor such that
1 joule of work done in taking 1 coloumb of charge from in point to other,

and the formula V=W/Q,where V is p.d, W as energy converted from
electrical to other forms, Q as the charge.

I REALLY DON"T UNDERSTAND HIM!!!! I looked through Enc.pedia, books,
dictionaries, and they generally say the same thing. So if you got some
time in your hand, please explain to me what is he talking about!!!! 

email me on shinla@mbox2.singnet.com.sg


Thank you so muche!

Cheeros,
-shinla

From fenimore@bounce.junk Tue Apr  8 10:06 PDT 1997
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Date: Tue, 8 Apr 1997 09:46:46 -0700
To: baez@math.ucr.edu
From: fenimore@bounce.junk (Paul Fenimore)
Subject: Pauli exclusion and Cooper pairs
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Hello,

There are two issues to mention regarding the puzzle:

(1) In the BCS model of superconductivity, electrons in a Cooper
pair have paired momenta, not paired positions. Even if there
where significant wave function overlap (which there isn't in the
low-T materials), the electrons would still have different crystal
momenta (+k and -k).

(2) The fact that many Cooper pairs share a quantum state says
nothing about the constituent electrons sharing states. Since
the electrons in a pair have crystal momenta at +k and -k,
requiring the quasi-particles (Cooper pairs) to all have their
momenta K near zero doesn't do anything to restrict the number of
quantum states available to the constituent electrons.

Paul Fenimore

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