翻訳と辞書 Words near each other ・ Permatang Pauh by-election, 2015 ・ Permatang Tinggi ・ Permatemp ・ Permawar ・ Permeability ・ Permeability (earth sciences) ・ Permeability (electromagnetism) ・ Permeability (foundry sand) ・ Permeability (nautical) ・ Permeability (spatial and transport planning) ・ Permeable paving ・ Permeable Press ・ Permeable reactive barrier ・ Permeable Reactive Weir ・ Permeameter ・ Permeance ・ Permease ・ Permeation ・ Permeke (film) ・ Permendur ・ Permeon Biologics ・ Permesta ・ Permethrin ・ Permian ・ Permian Basin ・ Permian Basin (Europe) ・ Permian Basin (North America) ・ Permian Basin International Oil Show ・ Permian Basin Petroleum Museum ・ Permian Basin Regional Planning Commission Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Permeance ： ウィキペディア英語版 Permeance Permeance, in general, is the degree to which a material admits a flow of matter or energy. Permeance is usually represented by a curly (calligraphic) capital P: $\backslash mathcal$, or capital lambda Λ. ==Electromagnetism== In electromagnetism, permeance is the inverse of reluctance. Permeance is a measure of the quantity of flux for a number of current-turns in magnetic circuit. A magnetic circuit almost acts as though the flux is 'conducted', therefore permeance is larger for large cross sections of a material and smaller for longer lengths. This concept is analogous to electrical conductance in the electric circuit. Magnetic permeance $\backslash mathcal$ is defined as the reciprocal of magnetic reluctance $\backslash mathcal$ (in analogy with the reciprocity between electric conductance and resistance): $\backslash mathcal\; =\; \backslash frac\; =\; \backslash frac$ using Hopkinson's law (magnetic circuit analogue of Ohm's law for electric circuits) and the definition of magnetomotive force (magnetic analogue of electromotive force): $\backslash mathcal\; =\; \backslash Phi\_B\; \backslash mathcal\; =\; NI$ Where: ''ΦB'' = Magnetic flux ''NI'' = Current-turns, (current) × (number of turns of conductor to make a coil). Alternatively in terms of magnetic permeability (analogous to electric conductance): $\backslash mathcal\; =\; \backslash frac$ Where: ''μ'' = Permeability of material ''A'' = Cross-sectional area $\backslash ell$ = magnetic path length The SI unit of magnetic permeance is "webers per ampere-turn", that is Wb A−1. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Permeance」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.