| 单词 | resistance box |
| 释义 | > as lemmasresistance box resistance box n. a box having two or more terminals and containing a number of electrical resistors of different calibrated values, such that any combination of them may be chosen using controls on the box; cf. post office box n. (b) at post office n. Compounds 2, decade box at decade n. 1b(a). ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun] > non-conductor, resistor resister1760 resistance coil1843 rheostat1843 resistance box1867 resistance1878 resistor1905 1867 R. Sabine Electr. Telegr. ii. 253 (heading) Siemens' resistance boxes. 1933 A. W. Barton Text Bk. Heat i. 25 You decide to use the potentiometer method and obtain a cell of E.M.F. 2 volts, a resistance box going up to 2000 ohms and a supply of uniform wire of resistance 0.100 ohms per cm. 2000 J. Breithaupt New Understanding Physics for Adv. Level (ed. 4) xxiii. 485/1 A standard cell of e.m.f. 1.08 V is balanced by the p.d. across one of the resistance boxes set at 510 ohms. < as lemmas |
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