| 单词 | singing arc |
| 释义 | > as lemmassinging arc singing arc n. A direct current arc across which is connected a tuned circuit, causing the arc to oscillate and emit a sound at the frequency of the tuned circuit. ΘΚΠ the world > matter > physics > science of sound > vibration > [noun] > direct current arc singing arc1903 the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [noun] > waveform > arc discharge producing short waves > direct current arc singing arc1903 1903 Sci. Abstr. A. 6 30 The author suggests replacing the ordinary high-capacity condensers necessary to produce Duddell's ‘singing arc’ by the much less costly aluminium condenser. 1906 Electrician 21 Dec. 375/1 Limitations as to frequency..beset the use of the singing arc as a transformer of the direct mains current into uninterrupted high-frequency alternating current. 1913 Year-bk. Wireless Telegr. & Teleph. 399 Duddrell's discovery of the singing arc in 1900. 1950 S. G. Starling & A. J. Woodall Physics xxxvi. 874 The singing arc..where electrical and thermal factors are involved in the maintenance of oscillations. < as lemmas |
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