| 单词 | needle gap |
| 释义 | > as lemmasneedle gap needle gap n. a pair of needle-shaped electrodes placed in line, separated by a gap across which an electric discharge can take place when the potential difference between them exceeds a value dependent on the size of the gap. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > discharge of electricity > [noun] > point of discharge > gap spark-gap1889 sphere gap1913 needle gap1916 1916 C. C. Garrard Electr. Switch & Controlling Gear viii. 563 One source of uncertainty can be removed if needles are used for the measuring gap, in which case the result obtained is termed the ‘equivalent needle gap’. 1977 Proc. Royal Soc. A. 357 21 The resistance unit below one rod..was permanently short-circuited; the other unit..was protected by a needle gap set to spark over at 10 kV. < as lemmas |
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