Wiedemann-Franz law demonstration in a student practicum

The Wiedemann-Franz law, a prediction of the electronic theory of electrical and thermal conduction in metals, states that the Lorenz number L = κ/σT, where κ, σ, and T are the thermal conductivity, electrical conductivity, and absolute temperature, respectively, is a universal constant in certain c...

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Bibliographic Details
Published in:American journal of physics 2017-06, Vol.85 (6), p.473-477
Main Authors: Glazkov, V. N., Ginzburg, L., Orlov, A.
Format: Article
Language:English
Subjects:
Conduction
Conductivity
Experiments
Physics
Temperature
Thermal conductivity
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Summary:The Wiedemann-Franz law, a prediction of the electronic theory of electrical and thermal conduction in metals, states that the Lorenz number L = κ/σT, where κ, σ, and T are the thermal conductivity, electrical conductivity, and absolute temperature, respectively, is a universal constant in certain cases. We present here a simple experimental setup to verify this prediction in a teaching laboratory.
ISSN:0002-9505
1943-2909
DOI:10.1119/1.4982787