Wiedemann-Franz law is a prediction of electronic theory of electric and thermal conductivity in metals, which states that a Lorenz ratio L=κ/(σT), where κ is a thermal conductivity, σ --- electric conductivity and T --- absolute temperature, is a universal constant in certain cases. We present here a simple experimental setup to verify this prediction in a teaching experiment.
@article{arxiv.1701.02557,
title = {Wiedemann-Franz law demonstration in a student practicum},
author = {V. Glazkov and L. Ginzburg and A. Orlov},
journal= {arXiv preprint arXiv:1701.02557},
year = {2017}
}