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单词 reactance
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WordReference Random House Unabridged Dictionary of American English © 2024
re•ac•tance  (rē aktəns),USA pronunciation n. 
  1. Electricitythe opposition of inductance and capacitance to alternating current, expressed in ohms: equal to the product of the sine of the angular phase difference between current and voltage and the ratio of the effective voltage to the effective current. Symbol: X Cf. capacitive reactance, inductive reactance. 
  2. Physics[Acoustics.]See acoustic reactance. 
  • react + -ance 1890–95

Collins Concise English Dictionary © HarperCollins Publishers::
reactance /rɪˈæktəns/ n
  1. the opposition to the flow of alternating current by the capacitance or inductance of an electrical circuit; the imaginary part of the impedance Z, Z = R + iX, where R is the resistance, i = √–1, and X is the reactance. It is expressed in ohms
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