(1) The opposition to the flow of alternating current in a circuit. Represented by the letter "Z" and measured in ohms, impedance is the combination of resistance, inductance and capacitance of the circuit. See ohm.
(2) The opposition that a speaker produces to the alternating current coming from an amplifier. The lower the impedance, the more power required. Most speakers have an impedance of four to eight ohms. See ohm.
Download Computer Desktop Encyclopedia to your PC, iPhone or Android.
In alternating-current electric circuits, a quantitative measure of the opposition to the flow of current upon the application of voltage; measured in ohms.
(Z) Measured in ohms it is the total opposition to the flow of current offered by a circuit. Impedance consists of the vector sum of resistance and reactance.
|Previous:||impaired glucose tolerance, immunotoxin, immunosympathectomy|
|Next:||impeller, impermeable, impermeant|
Obstruction or opposition to passage or flow, as of an electric current or other form of energy.
Common misspelling(s) of impedance