English-Thai Dictionary
impedance
N การ วัด ความต้านทาน ต่อ ไฟฟ้ากระแสสลับ มี หน่วย คือ โอห์ม (z kan-wad-kwam-tan-tan-tor-fai-fa-kra-sae-sa-lab-me-nuai-kue-om
Webster's 1913 Dictionary
IMPEDANCE
IMPEDANCE Im *ped "ance, n. [Impede + -ance. ] (Elec.)
Defn: 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 R2 + X2, where R = ohmic resistance, X =reactance. For an inductive circuit, X = 2pfL, where f = frequency and L = self-inductance; for a circuit with capacity X = 1 ÷ 2pfC, where C = capacity.
New American Oxford Dictionary
impedance
im ped ance |imˈpēdns ɪmˈpidns | ▶noun the effective resistance of an electric circuit or component to alternating current, arising from the combined effects of ohmic resistance and reactance. See also acoustic impedance. [Impedance is usually expressed as a complex quantity Z = R + jX, where R is resistance, X is reactance, and j is the imaginary square root of −1. ]usage: Impedance is a specialized electrical term (as defined above ), while impediment is an everyday term meaning 'a hindrance or obstruction': a low- impedance power supply; interpreting his handwriting was an impediment to getting business done.
Oxford Dictionary
impedance
impedance |ɪmˈpiːd (ə )ns | ▶noun the effective resistance of an electric circuit or component to alternating current, arising from the combined effects of ohmic resistance and reactance. See also acoustic impedance. ●Impedance is usually expressed as a complex quantity Z = R + jX, where R is resistance, X is reactance, and j is the imaginary square root of −1.
Sanseido Wisdom Dictionary
impedance
im ped ance /ɪmpíːd (ə )ns /名詞 U 1 〘電 〙インピーダンス 〘交流における電圧と電流の比; ｟記号 ｠Z 〙.2 妨害 [障害 ]物 .
The Wordsmith Dictionary