Talk:Electrical conductivity

message: I noticed that the table of SI electromagnetism units was on several entries, so I think I'll make an entry just for it  and then put a link to it at the bottom of the entries that it used to be in. — Preceding unsigned comment added by TDogg310 (talk • contribs) 22:17, 31 July 2005 (UTC)
thread_title: Table of SI units

message: Measuring the conductivity of a metal rod is relatively simple, but how do you measure the conductivity of a fluid? 
Will a horizontal glas tube with facing(inert)platimum disk-electrodes at each end (so you can calculate the length and area of the fluid column do the trick? One can then apply a AC voltage accross the electrodes and measure the current to calculate the resistance of the fluid column and hence calculate the conductivity of the fluid.
What is the recommended practice?--168.209.98.35 20:24, 9 December 2005 (UTC)
thread_title:  Measuring Electrical Conductivity in Fluids 

message: I seem to remember in high school science, something about potatoes being used as conductors or like a primative battery.  Am I wrong?209.74.5.35
:You can use a potato as a battery. This should be disussed under battery, if it isn't already. --Heron 15:30, 25 March 2006 (UTC)
thread_title:  Electrical expreiments with potatoes 

message: I propose that we combine the tables of conductivity and resistivity onto their own page, because they are fundamentally related. Comments? Fresheneesz 22:44, 27 May 2006 (UTC)
replies: text: Agreed. — Omegatron 19:02, 24 February 2007 (UTC)
thread_title:  Table of conductivity and resistivity 

message: I have something on my mind that I want to clarify. Is there a gas that can conduct an electrical charge were it will move within that specific gas only/mostly? - Johan1984
:Lightning - Rip-Saw 10:43, 21 August 2007 (UTC)
thread_title:  Electrical Conductivity: Gas 

message: The formula seems not quite right.  It causes most conductivity to increase with temperature instead of being reduced.  As far as I can tell the T and the Tprime are out of order.  63.164.202.130 14:35, 30 August 2007 (UTC)
replies: text: This is because the formula is for semiconductors, where electrical conductivity increases with increasing temperature. The formula is for calibrating an EC water meter using a calibration solution. Different EC meters use different slopes. This section probably needs a bit of tidying and sectioning to specify the EC dependence for metals and semiconductors (such as water). +mt 01:09, 28 May 2008 (UTC)

text: Please read the text - directly for semiconductors, inversely for metals. Materialscientist (talk) 22:47, 28 June 2010 (UTC)
thread_title:  Temperature Dependance 

message: I suppose there's an imprecision on the definition of the electrical conductivity:
"The conductivity σ is defined as the ratio of the current density J to the electric field strength E"
I believe it must say: ...the ratio fo the FREE current density etc..
since the total current density depends on the free and the bounded current (see Magnetization).
--Felipebm (talk) 16:00, 7 May 2008 (UTC)
thread_title:  Current Density or Free Current Density 

message: This page is really helpful.
Thanks
Kingpenguins  —Preceding unsigned comment added by Kingpenguins2007 (talk • contribs) 23:21, 24 February 2009 (UTC)
thread_title:   

message: Maybe mention it somewhere in the text (general properties) and link to its article. Or just in the related links.  —Preceding unsigned comment added by 161.53.198.136 (talk) 23:30, 9 September 2009 (UTC)
thread_title:  Superconductivity 

message: Added text about Aluminium being commonly used for High Voltage Power Distribution ie. between electricity "Transmission" Towers. Mostly due to lighter weight, and cost(?) for same current carrying capacity. Wondering if this has always been the case? Aluminium is not cheap, (Copper more expensive?) Aluminium ironically need HEAPS of Electricity to refine. A bit off-topic, but? --220.101.28.25 (talk) 23:16, 3 December 2009 (UTC)
replies: text: Going to aluminium and copper and <CTRL>-F for "price" brings a picture that copper is some 2.5 times more expensive than Al. I've heard Al is reinforced with steel core for power lines. Materialscientist (talk) 23:22, 3 December 2009 (UTC)
thread_title:  High Voltage Power Distribution 

message: Electrical conductivity is potential to facilitate flow of charge (Q). There are currently two ways charge can be conducted in an electric field setup: 
* free-electron flow theory (in solid and plasma)
* ion-carrier (in liquid only, such as the mechanism of hydronium ion migration/relay) 
Please note this.  — Preceding unsigned comment added by Otivaeey (talk • contribs) 14:26, 13 December 2010 (UTC)
thread_title:  Classification of electrical conduction