Електрична струја — разлика између измена

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Свака електрична струја ствара [[магнетно поље|магнетско поље]]. Магнетско поље се може представити затвореним кружним линијама који окружују проводника.<ref name="Jiles">{{harvnb|Jiles|1998|pp=2}}</ref><ref name="Feynman">{{Cite book|last=Feynman| first = Richard Phillips | last2=Leighton| first2 = Robert B. | last3=Sands| first3 = Matthew | title = The Feynman Lectures on Physics | publisher = California Institute of Technology | volume = 2 |year=1964|pages=1.7–1.8| url = https://books.google.com/books?id=uaQfAQAAQBAJ&printsec=frontcover&dq=%22magnetic+field |isbn=978-0-465-07998-8|pages=}}</ref>
 
Електрична струја се непосредно може мерити [[галванометар|галванометром]],<ref>{{Cite web|url=http://prugalvanometer.weebly.com/theory.html | title = Theory of Galvanometer | accessdate=5. 4. 2017.}}</ref> али та метода захтева претходно прекидање кола, што је непрактично у неким случајевима. Електрична струја се понекада може измерити и без прекидања кола, детектовањем и мерењем магнетског поља око проводника. Неки од таквих уређаја су [[сензор]]и [[Халов ефекат|Халовог ефекта]],<ref>{{cite web|url=http://electrical-engineering-portal.com/an-overview-of-clamp-meter | title = An Overview Of Clamp Meter |date=6. 5. 2012}}</ref> [[струјни трансформатор]]и и [[Калем Роговског|калеми Роговског]].<ref name="Webster">{{citeCite book|author=John G. Webster, Halit Eren (ed.), |title=Measurement, Instrumentation, and Sensors Handbook, Second Edition: Electromagnetic, Optical, Radiation, Chemical, and Biomedical Measurement|location=|publisher=CRC Press|year=2014|isbn=978-1-4398-4891-3|pages=16-6}} to 16-7.</ref><ref name="Klaus Schon">Klaus Schon, ''High Impulse Voltage and Current Measurement Techniques: Fundamentals – Measuring Instruments – Measuring Methods'', Springer Science & Business Media. {{page|year=2013|isbn=978-3-319-00378-8|pages=193}}</ref>
 
=== Електромагнет ===
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<ref name=Purcell >{{Cite book|last=Purcell| first = Edward M. |authorlink= Edward Mills Purcell |year=1985| title = Electricity and magnetism | edition = 2nd | series = Berkeley Physics Course | volume = 2 |isbn=978-0-07-004908-6| publisher = McGraw-Hill |pages=129}}</ref>
 
<ref name= Consoliver >{{citeCite book|title=Automotive ignition systems | last=Consoliver| first = Earl L.| last2=Mitchell| first2 = Grover I.| publisher = McGraw-Hill |year=1920|id=| url = https://books.google.com/books?id=_dYNAAAAYAAJ&pg=PA4&dq=ohm%27s+law+current+proportional+voltage+resistance |pages=4}}</ref>
 
<ref name="Fischer-Cripps" >{{cite book|title=The electronics companion|last=Fischer| first = Anthony C.-Cripps|publisher = CRC Press|year=2004|isbn=978-0-7503-1012-3|pages=13| url = https://books.google.com/books?id=3SsYctmvZkoC&pg=PA13
Ред 196:
 
== Литература ==
* {{Cite book|title=Automotive ignition systems | last=Consoliver| first = Earl L.| last2=Mitchell| first2 = Grover I.| publisher = McGraw-Hill |year=1920|id=| url = https://books.google.com/books?id=_dYNAAAAYAAJ&pg=PA4&dq=ohm%27s+law+current+proportional+voltage+resistance |pages=4}}
* {{Cite book|author=John G. Webster, Halit Eren (ed.), |title=Measurement, Instrumentation, and Sensors Handbook, Second Edition: Electromagnetic, Optical, Radiation, Chemical, and Biomedical Measurement|location=|publisher=CRC Press|year=2014|isbn=978-1-4398-4891-3|pages=16-6}} to 16-7.</ref><ref name="Klaus Schon">Klaus Schon, ''High Impulse Voltage and Current Measurement Techniques: Fundamentals – Measuring Instruments – Measuring Methods'', Springer Science & Business Media. {{page|year=2013|isbn=978-3-319-00378-8|pages=193}}
* {{Cite book| ref=harv|last=Purcell| first = Edward M. |authorlink= Edward Mills Purcell |year=1985| title = Electricity and magnetism | edition = 2nd | series = Berkeley Physics Course | volume = 2 |isbn=978-0-07-004908-6| publisher = McGraw-Hill |pages=129}}
* {{Cite book| ref=harv|last=Griffiths| first = David J. |authorlink= David Griffiths (physicist) |year=1999| title = Introduction to electrodynamics | edition = 3rd | publisher = Prentice Hall |isbn=978-0-13-805326-0|pages=289}}