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???
04/01/09 13:32
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 		 #164158 - For now, such .... ?
Responding to: ???'s previous message
Per Westermark said:
For now, such a specialisation has not been established.


What is Wiedemann-Franz law for?

K/(σ) = L*T

L=Lorenz number .

"In physics, the Wiedemann-Franz law states that the ratio of the electronic contribution to the thermal conductivity (K) and the electrical conductivity (σ) of a metal is proportional to the temperature (T).

Per Westermark said:

Now you have to tell me why you think the OP specifically intended to limit himself to materials where there is a correlation between electrical and thermal conductivity?


Your angle of interpretting may be different from mine . I asked him "Only possible for metals ? not for materials I guess? "
my emphasis
OP says somewhere : "Actually i want to make an instrument which measure the Thermal and electrical conductivity of any Material(Metal and Semi metal) if u have any idea please i am waiting thanks"

Metals and semimetals refute your thinking for measurement regarding as you say "Why limit to metals? " .

-AP


List of 38 messages in thread
TopicAuthorDate
Thermal and Electrical Conductivity devices            01/01/70 00:00      
   Pardon?            01/01/70 00:00      
      Get it right            01/01/70 00:00      
         Get down to work!            01/01/70 00:00      
   I have no clue what you mean...            01/01/70 00:00      
      neither do I            01/01/70 00:00      
         may be            01/01/70 00:00      
   Only possible for metals ? not for materials I guess?            01/01/70 00:00      
      Why limit to metals?            01/01/70 00:00      
         all solid material            01/01/70 00:00      
         For all solid materials, are you sure?            01/01/70 00:00      
            Just a question of bounds and quality            01/01/70 00:00      
               Who cares            01/01/70 00:00      
                  Usage and physical units needed for a value to be meaningful            01/01/70 00:00      
                     Dont use only the thermal part thermal conductivity wont            01/01/70 00:00      
                        Your point is?            01/01/70 00:00      
                           Not mine but the OPs            01/01/70 00:00      
            Speed of sound?!            01/01/70 00:00      
               Google it , these are Basics of the topic            01/01/70 00:00      
            Homogenous or not            01/01/70 00:00      
               Per the topic is THERMAL & ELECTRICAL            01/01/70 00:00      
                  Any material , more info here Wiedemann-Franz law            01/01/70 00:00      
                     Relevance for the OP?            01/01/70 00:00      
                        No relevance at all!            01/01/70 00:00      
                         For now, such .... ?            01/01/70 00:00      
                           OP said "all solid material"            01/01/70 00:00      
      For the Material research            01/01/70 00:00      
         Already answered            01/01/70 00:00      
   Setting a question mark makes it clearer            01/01/70 00:00      
      I need the solution            01/01/70 00:00      
         Make or buy            01/01/70 00:00      
            re make or buy            01/01/70 00:00      
               Why would smaller samples give better results?            01/01/70 00:00      
               and why do you suppose that is?            01/01/70 00:00      
         A warning...            01/01/70 00:00      
            Thermal conductivity            01/01/70 00:00      
               Difficult            01/01/70 00:00      
                  Interesting            01/01/70 00:00      

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