Изворни код странице Хенри

{{otheruses}}
{{Infobox Unit
| name = Хенри
| image = [[File:Inductor.jpg|150px]]
| caption = [[inductor|Индуктор]] састављен од [[wire|жице]] намотане око [[magnetic core|магнетног језгра]] која се користи за ограничавање и вођење индукованог [[magnetic field|магнетног поља]].
| standard = [[Изведене јединице СИ система]]
| quantity = [[Самоиндукција|Индуктанца]]
| symbol = -{H}-
| dimension = -{M<sup>1</sup>·L<sup>2</sup>·T<sup>−3</sup>·I<sup>−2</sup>}-
| namedafter = [[Џозеф Хенри]]
| units1 = [[SI base unit|Основне јединице СИ система]]
| inunits1 = -{1 [[kilogram|kg]]⋅[[metre|m]]<sup>2</sup>⋅[[second|s]]<sup>−2</sup>⋅[[ampere|A]]<sup>−2</sup>}-
}}

'''Хенри''' ([[енглески језик|енг]]. ''henry''; симбол: '''H''') је [[Међународни систем јединица|СИ]] јединица за [[Индукција (физика)|индукцију]].<ref>{{cite web | title=How Many? A Dictionary of Units of Measurement |last=Rowlett| first=Russ | url=http://www.unc.edu/~rowlett/units/dictH.html | publisher=[[University of North Carolina at Chapel Hill]] | access-date=17. 01. 2022 | archive-date=29. 08. 2016 | archive-url=https://web.archive.org/web/20160829224528/https://www.unc.edu/~rowlett/units/dictH.html | url-status=dead}}</ref> Ако је стопа промене струје у колу 1 [[ампер]] по [[секунд]]и и резултујућа електромоторна сила износи један [[волт]], онда је индуктивност тог кола један хенри.

Хенри је дефинисан као V·A<sup>-1</sup>·s = -{m}-²·kg·s<sup>-2</sup>·A<sup>-2</sup> у СИ јединицама. Јединица је добила име по [[Сједињене Америчке Државе|америчком]] научнику [[Џозеф Хенри|Џозефу Хенрију]], 
америчком научнику који је открио електромагнетну индукцију независно и у отприлике у исто време када и [[Мајкл Фарадеј]] (1791–1867) у Енглеској.<ref>{{cite web | title = A Princeton Companion | url = http://etcweb.princeton.edu/CampusWWW/Companion/henry_joseph.html |author=Herbert S. Bailey, Jr| access-date = 17. 01. 2022 | archive-date = 12. 08. 2011 | archive-url = https://web.archive.org/web/20110812130355/http://etcweb.princeton.edu/CampusWWW/Companion/henry_joseph.html | url-status = dead}}</ref>

== Дефиниција ==

[[inductance|Индуктивност]]<ref>{{Cite book |author=Serway, A. Raymond |last2=Jewett| first2 = John W. | last3 = Wilson | first3 = Jane |author4=Wilson, Anna | last5 = Rowlands | first5 = Wayne |title=Physics for global scientists and engineers |isbn=9780170355520 |edition=2ndition |chapter=32 |date=2016-10-01 |df=dmy-all|pages=901 }}</ref><ref>{{cite book |last=Heaviside|first=Oliver |title=Electrical Papers |url=https://archive.org/details/bub_gb_bywPAAAAIAAJ |year=1894|publisher=Macmillan and Company |pages=[https://archive.org/details/bub_gb_bywPAAAAIAAJ/page/n290 271]}}</ref><ref>{{cite web |last=Elert|first=Glenn|title=The Physics Hypertextbook: Inductance |url=http://physics.info/inductance/ |access-date=2016-07-30 |df=dmy-all}}</ref><ref>{{cite web |first=Michael W. |last=Davidson|title=Molecular Expressions: Electricity and Magnetism Introduction: Inductance |url=http://micro.magnet.fsu.edu/electromag/electricity/inductance.html |year=1995–2008}}</ref><ref>{{cite web|title=A Brief History of Electromagnetism|url=http://web.hep.uiuc.edu/home/serrede/P435/Lecture_Notes/A_Brief_History_of_Electromagnetism.pdf}}</ref> електричног кола је један хенри када [[Current (electricity)|електрична струја]] која се мења брзином од једног [[ампер]]а у [[second|секунди]] резултира [[electromotive force|електромоторном силом]]<ref name="Stewart">{{cite book |last=Stewart| first=Joseph V.| title=Intermediate electromagnetic theory | url=https://archive.org/details/intermediateelec0000stew | publisher=World Scientific | publication-place=Singapore River Edge, NJ |year=2001| isbn=978-981-02-4470-5 | oclc=47127179 |pages=[https://archive.org/details/intermediateelec0000stew/page/389 389]}}</ref><ref name="Tipler803">{{cite book|last=Tipler|first=Paul A.|title=Physics|date=January 1976|publisher=Worth Publishers, Inc.|location=New York, NY|isbn=978-0-87901-041-6|pages=[https://archive.org/details/physics00tipl/page/803 803]|url=https://archive.org/details/physics00tipl/page/803}}</ref><ref>{{cite journal | journal = Transactions of the American Electrochemical Society | title = The Relation Between Contact Potentials and Electrochemical Action |last=Langmuir|first=Irving| volume = 29 | publisher = The Society | pages = 175 | year = 1916 | url = https://books.google.com/books?id=OW0SAAAAYAAJ&q=%22electromotive%20force%20is%20that%22&pg=PA172}}</ref> од једног [[волт]]а преко индуктора:

:<math>\displaystyle V(t)= L \frac{dI}{dt}</math>,
где ''V''(''t'') означава резултујући напон у колу, ''I''(''t'') је струја кроз коло, а ''L'' је индуктивност кола.

Хенри је [[SI derived unit|изведена јединица]] заснована на четири од седам основних јединица [[International System of Units|Међународног система јединица]]: [[килограм]] (kg), [[метар]] (m), [[секунда]] (s) и [[ампер]] (A). Изражен у комбинацијама СИ јединица, Хенри је:<ref>{{cite web | title = Essentials of the SI: Base & derived units | work = The NIST Reference on Constants, Units and Uncertainty | url = http://physics.nist.gov/cuu/Units/units.html | publisher = [[National Institute of Standards and Technology]]}}</ref>
:<math>\text{H}
= \dfrac{\text{kg} {\cdot} \text{m}^2}{\text{s}^{2} {\cdot} \text{A}^2}
= \dfrac{\text{N} {\cdot} \text{m}}{\text{A}^2}
= \dfrac{\text{kg} {\cdot} \text{m}^2}{\text{C}^2}
= \dfrac{\text{J}}{\text{A}^2}
= \dfrac{\text{T} {\cdot} \text{m}^2}{\text{A}}
= \dfrac{\text{Wb}}{\text{A}}
= \dfrac{\text{V} {\cdot} \text{s}}{\text{A}}
= \dfrac{\text{s}^2}{\text{F}}
= \dfrac{\Omega}{\text{Hz}}
= \Omega {\cdot} \text{s} ,
</math>

где је: {{nowrap|1=H = хенри}}, {{nowrap|1=kg = [[килограм]]}}, {{nowrap|1=m = [[метар]]}}, {{nowrap|1=s = [[секунда]]}}, {{nowrap|1=A = [[ампер]]}}, {{nowrap|1=N = [[Newton (unit)|њутн]]}}, {{nowrap|1=C = [[кулон]]}}, {{nowrap|1=J = [[џул]]}}, {{nowrap|1=T = [[Tesla (unit)|тесла]]}}, {{nowrap|1=Wb = [[Weber (unit)|вебер]]}}, {{nowrap|1=V = [[волт]]}}, {{nowrap|1=F = [[Farad|фарад]]}}, {{nowrap|1=Ω = [[ohm|ом]]}}, Hz = [[херц]]

== Употреба ==

Међународни систем јединица (СИ) прецизира да се симбол јединице назване за особу пише великим словом, док се име не пише великим словом у тексту реченице, осим када би било која реч на тој позицији била писана великим словом, као што је на почетак реченице или у материјалу помоћу насловног великог слова.

[[National Institute of Standards and Technology|Национални институт за стандарде и технологију]] Сједињених Држава препоручује корисницима који пишу на енглеском да користе множину као ''хенрије''.<ref name=Taylor>{{Cite journal|author=Ambler Thompson & Barry N. Taylor|year=2008|url=http://physics.nist.gov/cuu/pdf/sp811.pdf|title=NIST Special Publication 811: Guide for the Use of the International System of Units (SI)|publisher=National Institute of Standards and Technology|access-date=2013-03-21}}
</ref>{{rp|31}}

== Примене ==

Индуктивност завојнице зависи од њене величине, броја завоја и [[permeability (electromagnetism)|пермеабилности]]<ref name="jackson">{{cite book | author=Jackson, John David | title=Classical Electrodynamics | edition=3nd | location=New York | publisher=Wiley |year=1998| isbn=978-0-471-30932-1 | pages=193}}</ref> материјала унутар и око завојнице. [[Inductance#Calculating inductance|Формуле]] се могу користити за израчунавање индуктивности многих уобичајених распореда проводника, као што су паралелне жице или [[соленоид]].<ref>{{cite web |title=solenoid: Meaning in the Cambridge English Dictionary |url=https://dictionary.cambridge.org/dictionary/english/solenoid |website=dictionary.cambridge.org |access-date=16 January 2017 |url-status=live |archive-url=https://web.archive.org/web/20170116173524/https://dictionary.cambridge.org/dictionary/english/solenoid |archive-date=16 January 2017}}</ref><ref>or equivalently, the diameter of the coil is assumed to be infinitesimally small (Ampère 1823, p. 267: "des courants électriques formants de très-petits circuits autour de cette ligne, dans des plans infiniment rapprochés qui lui soient perpendiculaires").</ref><ref>Session of the ''[[Académie des sciences]]''  of 22 December 1823, published in print in: Ampère, "Mémoire sur la théorie mathématique des phénomènes électro-dynamiques", ''Mémoires de l'Académie royale des sciences de l'Institut de France'' 6 (1827), Paris, F. Didot,  [https://www.e-rara.ch/zut/content/pageview/1038909 pp. 267ff.] (and [https://www.e-rara.ch/zut/content/pageview/1039032 figs. 29–33]). "l'assemblage de tous les circuits qui l'entourent [viz. l'arc], assemblage auquel j'ai donné le nom de ''solénoïde électro-dynamique'', du mot grec σωληνοειδὴς, dont la signification exprime précisement ce qui a la forme d'un canal, c'est-à-dire la surface de cette forme sur laquelle se trouvent tous les circuits." (p. 267).</ref> Мала завојница са ваздушним језгром која се користи за подешавање АМ радија може имати индуктивност од неколико десетина микрохенрија. Велики намотај мотора са много обртаја око гвозденог језгра може имати индуктивност од стотина хенрија. Физичка величина индуктивности је такође повезана са њеним струјним ношењем и отпорским оценама напона.

== Референце ==
{{reflist}}

== Литература ==
{{Литература|30em}}
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{{Литература крај}}

== Спољашње везе ==
{{Commons category|Henry (unit)}}
* [https://web.archive.org/web/20171115094017/http://www.cvel.clemson.edu/emc/calculators/Inductance_Calculator/index.html ''Clemson Vehicular Electronics Laboratory: Inductance Calculator'']

{{СИ јединице}}
{{Нормативна контрола}}

[[Категорија:СИ изведене јединице]]
[[Категорија:Јединице за индуктивност]]