单词 | ohmic |
释义 | ohmicadj. Of or relating to electrical resistance; spec. obeying Ohm's law, or exhibiting behaviour consistent with it. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > resistance > [adjective] > obeying Ohm's law ohmic1886 1886 D. E. Hughes in Proc. Royal Soc. 40 458 By resistance I mean a pure ohmic resistance, a resistance which can only be measured, expressed, or balanced in ohms, and, whatever the cause, the effect is one of pure ohmic resistance. 1926 R. W. Lawson tr. G. von Hevesy & F. A. Paneth Man. Radioactivity i. 14 This proportionality between current and potential..only maintains for the initial part of the curve (the region of Ohmic current, cf. Fig. 3). 1949 Bell Syst. Techn. Jrnl. 28 471 (heading) Semi-conductor with two p-n junctions and ohmic metal contacts. 1987 J. Millman & A. Grabel Microelectronics (ed. 2) ii. 45 The contact potential across these junctions is constant, independent of the direction and magnitude of the current. A contact of this type is referred to as an ohmic contact. Compounds ohmic heating n. heating resulting from the passage of an electric current through a resistive material. ΚΠ 1958 Science 15 Aug. 340/2 We showed that the missing energy, delivered to the plasma in the form of ohmic heating, is always of just the right magnitude to raise the plasma to a useful temperature. 1967 Electronics 6 Mar. 136/2 Ohmic heating in the device induces diffusions that form p-n junctions. 1990 New Scientist 15 Dec. 24/2 A new generation of food products, sterilised using a process called ‘ohmic heating’, went on sale for the first time in Britain last week. Derivatives ˈohmically adv. by or in the manner of ohmic resistance; by means of ohmic heating. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > resistance > [adverb] ohmically1919 1919 Radio Rev. Dec. 144 A set of triodes arranged in an ohmically-coupled cascade. 1968 C. G. Kuper Introd. Theory Superconductivity i. 10 Changes in the field produce eddy currents, but they will decay Ohmically. 1994 Independent on Sunday 4 July (Business section) 4/5 Every part of the food heats up at the same rate, so ohmically sterilized food is not overcooked. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022). < |
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