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Henry (unit)
Henry (unit)
Published: 2014/11/17
Channel: Audiopedia
Henry (unit)
Henry (unit)
Published: 2016/01/22
Channel: WikiAudio
150717 Always Cantare2 HENRY Food Truck Support by Henry Unit
150717 Always Cantare2 HENRY Food Truck Support by Henry Unit
Published: 2016/05/30
Channel: HenryLauFP
Henry Meaning
Henry Meaning
Published: 2015/04/12
Channel: SDictionary
Metric Conversion Trick!!  Part 1
Metric Conversion Trick!! Part 1
Published: 2012/10/04
Channel: BrainSTEM
Fire Emblem Awakening - Female Avatar (My Unit) & Henry Support Conversations
Fire Emblem Awakening - Female Avatar (My Unit) & Henry Support Conversations
Published: 2013/03/14
Channel: justonegamr
Converting Metric Units using King Henry
Converting Metric Units using King Henry
Published: 2013/02/20
Channel: SmithMathAcademy
E6B Henry Unit 2
E6B Henry Unit 2
Published: 2015/10/15
Channel: gokhanozmar
E6B Henry Unit 4
E6B Henry Unit 4
Published: 2015/12/10
Channel: gokhanozmar
Moses Henry & The Unit Live @ Thankful The E.P Launch 2017
Moses Henry & The Unit Live @ Thankful The E.P Launch 2017
Published: 2017/09/21
Channel: Richie Mr.Fearless Stanisclaus
Henry
Henry's unit build 2 500 k
Published: 2014/02/21
Channel: RobMca100
E6B Henry Unit 6
E6B Henry Unit 6
Published: 2016/03/03
Channel: gokhanozmar
E4B Henry Unit 1
E4B Henry Unit 1
Published: 2014/02/13
Channel: gokhanozmar
E1D Henry Unit 2
E1D Henry Unit 2
Published: 2017/10/26
Channel: gokhanozmar
E4C Henry Unit 2
E4C Henry Unit 2
Published: 2016/04/28
Channel: gokhanozmar
12 Henry Unit 12, Northampton MA 01060 - Condo - Real Estate - For Sale -
12 Henry Unit 12, Northampton MA 01060 - Condo - Real Estate - For Sale -
Published: 2017/09/03
Channel: Jessica Ryan Lapinski
henry unit of electrical inductance
henry unit of electrical inductance
Published: 2015/07/29
Channel: Sofia Johns
Henry Makow "There Is A War On Gender, The Family Unit & Free Speech. It Is Truly Satanic."
Henry Makow "There Is A War On Gender, The Family Unit & Free Speech. It Is Truly Satanic."
Published: 2017/03/16
Channel: The Richie Allen Show
E6B Henry Unit 5
E6B Henry Unit 5
Published: 2016/01/19
Channel: gokhanozmar
Younique Unit (Eunhyuk, Hyoyeon, Taemin, Henry, Kai, Luhan)  - MAXSTEP (MV)
Younique Unit (Eunhyuk, Hyoyeon, Taemin, Henry, Kai, Luhan) - MAXSTEP (MV)
Published: 2012/10/31
Channel: ASIANMUSIKpop5
Taking apart a Henry motor unit
Taking apart a Henry motor unit
Published: 2011/06/22
Channel: NumaticVacuum
Dr. Peter Henry Responds As Essentia Health Grace Unit Transitions From Involuntary To Voluntary
Dr. Peter Henry Responds As Essentia Health Grace Unit Transitions From Involuntary To Voluntary
Published: 2017/11/03
Channel: LPTV - Lakeland Public Television
Omega 06 after unit 3. Bill - Henry - Alex.
Omega 06 after unit 3. Bill - Henry - Alex.
Published: 2017/10/12
Channel: Ms. Luna GrapeSEED
E4C Henry Unit 7
E4C Henry Unit 7
Published: 2016/11/14
Channel: gokhanozmar
E3B Henry Unit 7
E3B Henry Unit 7
Published: 2013/10/22
Channel: gokhanozmar
Henry - Unit 10
Henry - Unit 10
Published: 2014/06/10
Channel: Giao tiếp công việc Sáu chín Mshoatoeic
88 George Henry Blvd Unit 6, Toronto, Ontario, Canada
88 George Henry Blvd Unit 6, Toronto, Ontario, Canada
Published: 2017/09/21
Channel: myhometour
10 Beckford St, Unit B, Beverly MA - Henry Pizzo & Nell Johanson - Tel 978-317-6139 & 978-314-0621
10 Beckford St, Unit B, Beverly MA - Henry Pizzo & Nell Johanson - Tel 978-317-6139 & 978-314-0621
Published: 2017/10/04
Channel: BostonREP
E5C Henry Unit 2
E5C Henry Unit 2
Published: 2017/03/30
Channel: gokhanozmar
Unit 7 | The story teller | Story | Super Minds 5 by Henry Sonthuy
Unit 7 | The story teller | Story | Super Minds 5 by Henry Sonthuy
Published: 2016/05/13
Channel: Sơn Thuỷ Nguyễn
E5C Henry Unit 5
E5C Henry Unit 5
Published: 2017/06/26
Channel: gokhanozmar
Fort Henry Self Storage - Unit 184
Fort Henry Self Storage - Unit 184
Published: 2017/06/12
Channel: Bid13
Unit 3.2 Convert Parts to Units 2014 Henry Park Prelim Paper 2 Qn 18
Unit 3.2 Convert Parts to Units 2014 Henry Park Prelim Paper 2 Qn 18
Published: 2015/05/16
Channel: Math with Van
E3D Henry Unit 5
E3D Henry Unit 5
Published: 2013/08/28
Channel: gokhanozmar
Henry and Catherine sweet bright corner unit 2 bedroom
Henry and Catherine sweet bright corner unit 2 bedroom
Published: 2017/04/28
Channel: DOWNTOWN MGT S. HARRIS, RAY BART
E6A Henry Unit 7
E6A Henry Unit 7
Published: 2016/03/31
Channel: gokhanozmar
E5C Henry Unit 1
E5C Henry Unit 1
Published: 2017/03/02
Channel: gokhanozmar
Henry - Unit 8 - Decribe a picture
Henry - Unit 8 - Decribe a picture
Published: 2014/05/29
Channel: Giao tiếp công việc Sáu chín Mshoatoeic
Unit 10 Henry bakaly
Unit 10 Henry bakaly
Published: 2016/05/03
Channel: Henry Bakaly
Unit 6 Gadgets Song[Super Minds 3 by Sonthuy Henry]
Unit 6 Gadgets Song[Super Minds 3 by Sonthuy Henry]
Published: 2016/01/11
Channel: Sơn Thuỷ Nguyễn
Unit 44, 98 George Henry Blvd, North York, ON M2J, Canada
Unit 44, 98 George Henry Blvd, North York, ON M2J, Canada
Published: 2015/08/28
Channel: 360 Home Photography
Bible Study - Experiencing God By Henry Blackaby Unit One
Bible Study - Experiencing God By Henry Blackaby Unit One
Published: 2015/09/17
Channel: Greater Harvest Holiness Church
Unit 7 Get dressed story [Super Minds 1 by Henry Sonthuy]
Unit 7 Get dressed story [Super Minds 1 by Henry Sonthuy]
Published: 2016/01/05
Channel: Sơn Thuỷ Nguyễn
Unit 1 Our school Story[Super Minds 3 by Henry Sonthuy]
Unit 1 Our school Story[Super Minds 3 by Henry Sonthuy]
Published: 2016/03/13
Channel: Sơn Thuỷ Nguyễn
E4C Henry Unit 1
E4C Henry Unit 1
Published: 2016/03/31
Channel: gokhanozmar
The Race [Family and  Friends 2, Unit 15: Well done!, by Henry Sonthuy]
The Race [Family and Friends 2, Unit 15: Well done!, by Henry Sonthuy]
Published: 2015/12/29
Channel: Sơn Thuỷ Nguyễn
CMU [Contemporary Music Unit] - Henry [Open Spaces] 1971
CMU [Contemporary Music Unit] - Henry [Open Spaces] 1971
Published: 2011/02/19
Channel: Giovannino SenzaPaura
Henry - Unit 5 - The ugly Duckling
Henry - Unit 5 - The ugly Duckling
Published: 2014/05/22
Channel: Giao tiếp công việc Sáu chín Mshoatoeic
E3B Henry Unit 6
E3B Henry Unit 6
Published: 2013/10/03
Channel: gokhanozmar
Unit 7 In the hospital Story[Super Minds 3 by Henry Sonthuy]
Unit 7 In the hospital Story[Super Minds 3 by Henry Sonthuy]
Published: 2016/03/13
Channel: Sơn Thuỷ Nguyễn
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Henry
Inductor.jpg
An inductor composed of a wire wound around a magnetic core used to confine and guide the induced magnetic field.
Unit information
Unit system SI derived unit
Unit of Inductance
Symbol H 
Named after Joseph Henry
In SI base units: kgm2s−2A−2

The henry (symbol: H) is the SI derived unit of electrical inductance.[1] The unit is named after Joseph Henry (1797–1878), the American scientist who discovered electromagnetic induction independently of and at about the same time as Michael Faraday (1791–1867) in England.[2] The magnetic permeability of vacuum is 4π × 10−7 H⋅m−1 (henry per metre).

Definition[edit]

The inductance of an electric circuit is one henry when an electric current that is changing at one ampere per second results in an electromotive force of one volt across the inductor:

,

where V(t) denotes the resulting voltage across the circuit, I(t) is the current through the circuit, and L is the inductance of the circuit.

The henry is a derived unit based on four of the seven base units of the International System of Units: kilogram (kg), metre (m), second (s), and ampere (A). Expressed in combinations of SI units, the henry is:[3]

in which the following additional derived units occur: coulomb (C), farad (F), joule (J), weber (Wb), tesla (T), volt (V), hertz (Hz), and ohm (Ω).

Use[edit]

As with every International System of Units (SI) unit named for a person, the first letter of its symbol is upper case (H). However, when an SI unit is spelled out in English, it should always begin with a lower case letter (henry)—except in a situation where any word in that position would be capitalized, such as at the beginning of a sentence or in material using title case.

The United States National Institute of Standards and Technology recommends English-speaking users of SI to write the plural as henries.[4]:31

See also[edit]

References[edit]

  1. ^ Rowlett, Russ. "How Many? A Dictionary of Units of Measurement". University of North Carolina at Chapel Hill. 
  2. ^ Herbert S. Bailey, Jr. "A Princeton Companion". 
  3. ^ "Essentials of the SI: Base & derived units". The NIST Reference on Constants, Units and Uncertainty. National Institute of Standards and Technology. 
  4. ^ Ambler Thompson & Barry N. Taylor (2008). "NIST Special Publication 811: Guide for the Use of the International System of Units (SI)" (PDF). National Institute of Standards and Technology. Retrieved 2013-03-21. 

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