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Definition of "Impedance" |
The total opposition a circuit offers to the flow of alternating or other current in an electrical circuit. It is the ratio of the voltage to the current. [Unit: ohm , W] / The total opposition offered to the flow of an alternating current. It may consist of any combination of resistance, inductive reactance, and capacitive reactance. The total passive opposition offered to the flow of electric current. The symbol for impedance is Z. Impedance is a function of frequency, except in the case of purely resistive networks. / The total opposition a circuit offers to the flow of alternating or other current in an electrical circuit. It is the ratio of the voltage to the current. [Unit ohm, W]. / Impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied. / In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases,gas, liquid, and solid of that substance coexist in thermodynamic equilibrium. / (1) electrical property of a network that measures its ability to conduct electrical AC current for a given AC voltage. Impedance is defined as the ratio of the AC voltage divided by the AC current at a given point in the network. In general, impedance has two parts: a real (resistive) part and an imaginary (inductive or capacitive “reactive”) part. Unless the circuit is purely resistive (made up of resistors only), the value of impedance will change with frequency. |
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