Talk:Electrical resistivity and conductivity

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Mistaken postulate in Definition section?[edit]

Just a quick question. Unless I misunderstand something, under the heading "definition", it seems like the discussion about the definition of resticivity mistakenly reverses the point. Resticivity is defined as R=V/I, which is an intrinsic property of materials, while p=R*A/l specifies, as I read it, the resistance of an OBJECT, which varies with its geometry and is thus determined by its geometry and the intrinsic property, R, of its substance. But the article states the opposite. Or what? I know nothing about the subject, so might just be misreading it. I.e. it says:

"The reason resistivity is defined this way is that it makes resistivity an intrinsic property, unlike resistance.", but the rest of the content indicates that the words have just been swapped by mistake. I will not correct it, since I am no expert, but I urge someone to correct it if it is a mistake.

You say "V/I is an intrinsic property of materials" but that's not true. A long thin copper wire has a different V/I from a short thick copper wire, even though both are copper. --Steve (talk) 12:06, 16 May 2016 (UTC)

Dubious phrase[edit]

There is a hypothesis that electron pairing in high-temperature superconductors is mediated by short-range spin waves known as paramagnons

This phrase caught my eye because of new term I made redlinked. I did some reading and found this text saying that paramagnons are in fact suppress superconductivity. So, how they can "mediate"? Does somebody have access to the footnoting article to verify what it actually says? Staszek Lem (talk) 20:22, 5 August 2016 (UTC)