| 单词 | thomson effect |
| 释义 | > as lemmasThomson effect 1. Physics. Thomson effect: the effect an electric current has, when flowing in the direction of a temperature gradient, of absorbing or giving out heat independently of the Joule heating; so Thomson coefficient, a numerical measure of this effect for a material. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun] > independent effect Thomson effect1878 the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun] > independent effect > measurement of Thomson coefficient1906 1878 Encycl. Brit. VIII. 98/1 This anomaly led Tait to the discovery..that the Thomson effect in iron changes its sign..at a temperature near low red heat. 1906 Sci. Abstr. A. 9 481 The Thomson-, Peltier-, and Seebeck-effects may be combined in one diagram, and the author does this for the case of iron and silver. 1930 Engineering 9 May 596/2 The Thomson and Peltier coefficients were given values of the right general order of magnitude. 1966 C. R. Tottle Sci. Engin. Materials vi. 130 By choosing appropriate values of the Peltier and Thomson coefficients, two dissimilar materials can be arranged to produce a substantial e.m.f. if one junction is maintained at a high temperature and the other at a lower one. 1975 D. G. Fink Electronics Engineers' Handbk. xxvii. 3 At large values of dT/dx the Thompson effect may be comparable with the Seebeck effect and must be taken into account in the design of generators and refrigerators. < as lemmas |
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