| 单词 | electric current |
| 释义 | > as lemmaselectric current electric current n. a flow of electricity; = current n. 7a; the magnitude of such a flow.The direction of flow of a current is conventionally taken as from positive to negative, which is the opposite direction from that in which electrons (which are negative) actually move as charge carriers. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electric current > [noun] current1747 electric current1760 juice1896 1760 Philos. Trans. 1759 (Royal Soc.) 51 312 An electric current, setting in from the glass of the electrifying machine, and passing along the tube through the quicksilver and vacuum, and so to the earth. 1837 D. Brewster Treat. Magnetism 307 The influence of electric currents. 1863 J. Tyndall Heat i. 19 The existence and direction of an electric current are shown by its action upon a freely suspended magnetic needle. 1924 A. J. Allmand & H. J. T. Ellingham Princ. Appl. Electrochem. (ed. 2) i. 6 The energy expended in one second by an unvarying electric current of one ampere flowing under an electric pressure of one volt. 1992 Men's Health Nov. 34/2 If your problem persists, your dermatologist may recommend iontophoresis—a technique in which a weak electric current is applied to the sweat glands. < as lemmas |
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