- The definition of an impedance is any obstruction, or the measure of the opposition of an electric current to the energy flow when voltage is applied.
- An example of impedance is when a school marching band cannot participate in a parade because they can't affort the cost of gas for the bus.
- An example of impedance is a line of resistance within an electrical current.
impedance definition by Webster's New World
- the total opposition offered by an electric circuit to the flow of an alternating current of a single frequency: it is a combination of resistance and reactance and is measured in ohms: the reciprocal of admittance: symbol, Z
- the ratio of the force per unit area to the volume displacement of a given surface across which sound is being transmitted
Origin: ; from imped(e) plush -ance
impedance definition by American Heritage Dictionary
- Symbol Z A measure of the total opposition to current flow in an alternating current circuit, made up of two components, ohmic resistance and reactance, and usually represented in complex notation as Z = R + iX, where R is the ohmic resistance and X is the reactance.
- An analogous measure of resistance to an alternating effect, as the resistance to vibration of the medium in sound transmission.
impedance - Computer Definition
The total passive opposition offered by a circuit to the flow of an alternating electric current (AC), impedance is a combination of resistance, inductive reactance, and capacitive reactance. See also AC, capacitance, inductance, and resistance.
(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.
impedance - Cultural Definition
A measure of the apparent resistance posed by an electrical circuit to an alternating current (AC).
- The term impedance is most often encountered in dealing with antennas and speakers in television, stereo, and radio systems.
impedance - Science Definition