| 单词 | ohm-metre |
| 释义 | > as lemmasohm-metre ohm-metre n. the unit of electrical resistivity in the International System of Units, being the resistivity of a substance of which a metre cube has a resistance of 1 ohm. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun] > unit of resistance ohm1861 ohmad1865 ohm-centimetre1920 ohm-metre1935 milliohm1939 abohm1940 1935 Proc. National Acad. Sci. U.S.A. 21 582 The following table contains an incomplete list of m.k.s. units:... Resistivity..ρ..ohm.meter. 1957 H. Cotton Electr. Technol. (ed. 7) iii. 67 It is..logical to express ρ as so many ohms-centimetre..or ohm-metre [sic]... For example, for copper at normal room temperature ρ..= 1·72 × 10−8 Ω-m. 1975 G. Anderson Coring vii. 121 The porosity of the sand is above 20% and the resistivity ranges from 0.3 ohm-m for saltwater sands to several ohm-meters for oil-saturated sands. < as lemmas |
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