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Electrical Resistance 
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#1
Nov304, 08:14 AM

P: 22

Hello,
We all know Ohm's law U=RI, but I would like to know the physical explanation behind the apparition of the potential difference U of the resistance. thank you. 


#2
Nov304, 08:43 AM

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PF Gold
P: 29,241

http://people.deas.harvard.edu/~jone...ude_model.html Zz. 


#3
Dec904, 04:00 PM

Sci Advisor
P: 905

IIRC, Ohm's law was given a firm footing by Onsager. If you can get Phys Rev, see here:
http://prola.aps.org/abstract/PR/v38/i12/p2265_1 Otherwise, just google Onsager and "Ohm's law" and eventually you'll find something. 


#4
Dec904, 05:17 PM

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HW Helper
P: 11,948

Electrical Resistance
But i' have to stick with Zz's refering to the Drude model as being the most simple & comprehendable approach to what's really happenig in a conductor. Daniel. PS.What i said applies to another linear effect in conducting media,the classical Hall effect. 


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