| 单词 | joule effect |
| 释义 | > as lemmasJoule effect Joule effect n. (also †Joule's effect) (a) the heating effect of an electric current flowing through a resistance (described by Joule's law n. (a)); (b) a change in the linear dimensions (esp. length) of a body when it is subjected to a magnetic field. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun] > heating effect Joule effect1879 Joule heating1929 resistive heating1932 the world > matter > physics > mechanics > force > stress or force exerted and tending to deform > [noun] > alteration of form or dimensions caused by stress > specific alteration of dimensions Joule effect1879 stress dilatancy1944 1879 Encycl. Brit. VIII. 57/2 In general the Peltier effect is..mixed up with Joule's effect, and makes itself felt by producing a disturbance at the junction. 1914 Physical Rev. 4 499 If the change in length of AC is measured as the field, H, is varied, we have the ordinary longitudinal Joule effect, whereas if DB or the length normal to the page is measured we have the transverse Joule effect. 1931 S. R. Williams Magn. Phenomena ii. 108 In the Joule effect the changes in length are..very small. 1931 S. R. Williams Magn. Phenomena ii. 111 (heading) Transverse Joule effect—change in dimensions normal to the magnetic field. 1933 J. E. Phillips Intermediate Magn. & Electr. xiii. 303 The Peltier effect..is proportional to the first power of the current, while the Joule effect varies as the square of the current. 1939 L. F. Bates Mod. Magn. x. 303 The existence of a Joule effect in non-ferromagnetic substances was first proved by Kapitza. 1966 F. Brailsford Physical Princ. Magn. vi. 143 Additional to the high-field volume change is the Joule effect involving changes in linear dimensions in relatively low fields, which in most cases may be 10 to 100 times greater than those due to the volume magnetostriction. < as lemmas |
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