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impedance    音標拼音: [ɪmp'idəns]
n. 阻抗

阻抗

impedance
阻抗

impedance
阻抗

impedance
n 1: a material's opposition to the flow of electric current;
measured in ohms [synonym: {electric resistance}, {electrical
resistance}, {impedance}, {resistance}, {resistivity},
{ohmic resistance}]

Impedance \Im*ped"ance\, n. [Impede -ance.] (Elec.)
The apparent resistance in an electric circuit to the flow of
an alternating current, analogous to the actual electrical
resistance to a direct current, being the ratio of
electromotive force to the current. It is equal to root{R^{2}
X^{2}}, where R = ohmic resistance, X = reactance. For an
inductive circuit, X = 2[pi]fL, where f = frequency and L =
self-inductance; for a circuit with capacity X = 1 [div]
2[pi]fC, where C = capacity.
[Webster 1913 Suppl.]

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英文字典中文字典相關資料:
  • Electrical impedance - Wikipedia
    Impedance extends the concept of resistance to alternating current (AC) circuits, and possesses both magnitude and phase, unlike resistance, which has only magnitude Impedance can be represented as a complex number, with the same units as resistance, for which the SI unit is the ohm (Ω)
  • Electrical Impedance: What is it? (Types Examples)
    This page is about the impedance of an electrical circuit The page shows the basic definition of impedance, physical significance of impedances and representation of different forms of impedance, including impedances of series and parallel RL, RC and RLC circuits
  • Electrical impedance | Definition, Symbol, Units, Facts | Britannica
    Electrical impedance, measure of the total opposition that a circuit or a part of a circuit presents to electric current Impedance includes both resistance and reactance
  • What Is Impedance – Definition, Ohms, Resistance, Reactance
    Impedance is the total opposition a cable or circuit offers to alternating current (AC) It combines resistance and reactance, measured in ohms (Ω), and determines how easily AC signals move through a circuit, affecting voltage, current, and power
  • What is electrical impedance? | Definition from TechTarget
    Impedance, denoted as Z, is an expression of the opposition that an electronic component, circuit or system offers to alternating or direct electric current Impedance is a vector (two-dimensional) quantity consisting of two independent scalar (one-dimensional) phenomena: resistance and reactance
  • What is Impedance? - Learning about Electronics
    Impedance is the amount of resistance that a component offers to current flow in a circuit at a specific frequency In this article, we'll talk about how impedance is similar to and how it differs from just plain resistance
  • IMPEDANCE Definition Meaning - Merriam-Webster
    The meaning of IMPEDANCE is something that impedes : hindrance
  • Impedance - HyperPhysics
    where I and V are the rms or "effective" values The quantity Z is called impedance For a pure resistor, Z = R
  • What is Impedance? - The Tech Circuit™
    Impedance (Z) (also in OHMS) is the combination of all resistances and reactances in a circuit It can contain just resistance, just capacitive reactance, just inductive reactance, or any combination of the above
  • Impedance- Definition, Symbol, Unit, Formula - Electrical Volt
    This is all about impedance and complex impedance We have explained the concept of impedance, complex impedance, its units, and the formula for different circuit configurations and solved numerical examples





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