“impedance”的概念、定义、习题解题方法及翻译-物理辞典

单词	impedance
释义	impedance Symbol Z. The quantity that measures the opposition of a circuit to the passage of a current and therefore determines the amplitude of the current. In a d.c. circuit this is the resistance (R) alone. In an a.c. circuit, however, the reactance (X) also has to be taken into account, according to the equation: Z² = R² + X² , where Z is the impedance. The complex impedance is given by Z = R + iX , where i = v-1 . The real part of the complex impedance, the resistance, represents the loss of power according to Joule's law. The ratio of the imaginary part, the reactance, to the real part is an indication of the difference in phase between the voltage and the current
随便看	heat of atomization heat of combustion heat of formation heat of neutralization heat of reaction heat of solution heat pump heat radiation heat shield heat transfer Heaviside-Kennelly layer Heaviside-Lorentz units heavy hydrogen heavy water heavy-fermion system hecto- Heisenberg uncertainty principle Heisenberg, Werner Karl heliocentric universe Helmholtz free energy Helmholtz, Hermann Ludwig Ferdinand von henry Henry's law Henry, Joseph hertz

物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。