impedance

4 definitions found

impedance - Collaborative International Dictionary of English v.0.48 :

  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 rootR^{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.]

impedance - WordNet (r) 2.1 (2005) :

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

impedance - Free On-line Dictionary of Computing (26 May 2007) :

  impedance
  
     <electronics, physics> Opposition to flow of alternating
     current.  Impedance consists of resistance plus reactance
     (capacitive or inductive).  Measured in Ohms.
  
     (2003-12-02)
  

impedance - Moby Thesaurus II by Grady Ward, 1.0 :

  18 Moby Thesaurus words for "impedance":
     capacitive reactance, clog, cumbrance, electric resistance,
     hindrance, impediment, inductive reactance, magnetic reluctance,
     ohm, ohmage, reactance, reluctance, reluctivity, resistance,
     skin effect, specific reluctance, surface resistance,
     volume resistance