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# Self-impedance

noun
1.
Electricity. the total opposition to alternating current by an electric circuit, equal to the square root of the sum of the squares of the resistance and reactance of the circuit and usually expressed in ohms. Symbol: Z.
2.
Also called mechanical impedance. Physics. the ratio of the force on a system undergoing simple harmonic motion to the velocity of the particles in the system.
3.
something that impedes; an obstacle or hindrance.
noun
1.
a measure of the opposition to the flow of an alternating current equal to the square root of the sum of the squares of the resistance and the reactance, expressed in ohms Z
2.
a component that offers impedance
3.
Also called acoustic impedance. the ratio of the sound pressure in a medium to the rate of alternating flow of the medium through a specified surface due to the sound wave Za
4.
Also called mechanical impedance. the ratio of the mechanical force, acting in the direction of motion, to the velocity of the resulting vibration Zm
impedance
(ĭm-pēd’ns)
A measure of the opposition to the flow of alternating current through a circuit. Impedance is measured in ohms. The resistance of a circuit to direct current (also measured in ohms) is generally not the same as its impedance, due to the effects of capacitance and induction in and among the components of the circuit. See also impedance matching.
impedance [(im-peed-ns)]

A measure of the apparent resistance posed by an electrical circuit to an alternating current (AC).

Note: The term impedance is most often encountered in dealing with antennas and speakers in television, stereo, and radio systems.

Tagged:

• Self-important

[self-im-pawr-tnt, self-] /ˈsɛlf ɪmˈpɔr tnt, ˌsɛlf-/ adjective 1. having or showing an exaggerated opinion of one’s own importance; pompously conceited or haughty. self-important adjective 1. having or showing an unduly high opinion of one’s own abilities, importance, etc

• Self-imposed

[self-im-pohzd, self-] /ˈsɛlf ɪmˈpoʊzd, ˌsɛlf-/ adjective 1. imposed on one by oneself: a self-imposed task. self-imposed adjective 1. (of a task, role, or circumstance) having been imposed on oneself by oneself

• Self-impregnating

verb (used with object), impregnated, impregnating. 1. to make pregnant; get with child or young. 2. to fertilize. 3. to cause to be infused or permeated throughout, as with a substance; saturate: to impregnate a handkerchief with cheap perfume. 4. to fill interstices with a substance. 5. to furnish with some actuating or modifying element […]

• Self-improvement

[self-im-proov-muh nt, self-] /ˈsɛlf ɪmˈpruv mənt, ˌsɛlf-/ noun 1. improvement of one’s mind, character, etc., through one’s own efforts. self-improvement noun 1. the improvement of one’s status, position, education, etc, by one’s own efforts

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