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Interpretation of the Benedicks Effect

Abstract

ACCORDING to Benedicks1, thermoelectric forces should exist even in a homogeneous substance, if only the gradient of temperature is asymmetrically distributed. For example, a potential difference should occur at the ends of a homogeneous wire when both are kept at the same temperature, if a point in between is heated in such a way that the decrease of temperature takes place in a much shorter interval at one side compared with the other. The ordinary theory of conduction leads to effects which depend on the total temperature difference only and not on the length of the interval. Considerable doubt2 has been expressed, therefore, as to the reality of this Benedicks effect. By quite a simple macroscopic consideration, however, its existence can be demonstrated and also its maximum magnitude in a limiting case can be derived

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References

  1. Benedicks Eragbn. d Exakt. Natw., 8, 25 ; 1929. "Handb. Phys.", vol., 13, p. 200

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NORDHEIM, L. Interpretation of the Benedicks Effect. Nature 133, 100–101 (1934). https://doi.org/10.1038/133100a0

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