| 释义 |
electrometer|iːlɛk-, ɛlɛkˈtrɒmɪtə(r)|
[f. electro- + meter.]
An instrument for ascertaining the quality and quantity of electricity in an electrified body. Cf. also binant.
1749Gentl. Mag. 352 A true and exact electrometer. 1766Lane in Phil. Trans. LVII. 451 An instrument which I have contrived for this purpose may not improperly be called an electrometer. 1787A. Young in Glasg. Weekly Her. (1883) 7 July 2/7 An electrometer—a small, fine pith ball. 1812Sir H. Davy Chem. Philos. 128 The electrometer..consists of two gold leaves attached to a metal-plate. 1881Maxwell Electr. & Magn. I. 300. 1946 Electronic Engin. XVIII. 277/3 The two control grids are both highly insulated in accordance with electrometer valve requirements. 1958Chambers's Techn. Dict. Suppl. 976/1 Electrometer tube or valve, one with high grid insulation, specially designed for measuring minute currents or voltages.
Hence eˌlectroˈmetric, -ical, adjs., pertaining to electrometry. elecˈtrometry, the measurement of electricity by the electrometer.
1779Visct. Mahon Princ. Electr. i. 8 The electro⁓metrical Balls may thereby be made to divaricate. 1814G. J. Singer Elem. Electr. & Electro-Chem. iii. iv. 312 Some difficulty attends the demonstration of the electro⁓metrical effects. 1868Brit. Assoc. Rep. 1867 489 The first step towards accurate electrometry in every case is to deduce from the scale-readings numbers which shall be in simple proportion to the difference of potentials to be determined. 1956Nature 14 Jan. 57/2 Aviation medicine research depends on a detailed application of electrometrical recording techniques. |