›› 2011, Vol. 30 ›› Issue (1): 29-29.
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Abstract: In the classical microscopic picture of metal conduction,the collision between free electrons and positive ions satisfies three requirements of Poisson flow,thus the time interval between the collisions obeys an exponential distribution.The expression of metallic electric conductivity is concisely given.Hereby the Joule-Lenz law in differential form is derived self-consistently.
Key words: metallic electric conductivity, Poisson flow
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