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Article #15334Re: New Year question from Leo
From: Harry
Date: Thu, 29 Jan 2004 09:34
Date: Thu, 29 Jan 2004 09:34
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"Franz Heymann" <notfranz.heymann@btopenworld.com> wrote in message news:bv9dkj$ecs$8@titan.btinternet.com... > > "Harry" <harald.vanlintel@epfl.ch> wrote in message > news:4017b337$1@epflnews.epfl.ch... > > [snip] > > > This paper I have not read, sorry. The other one, you have not reacted any > > time about the scaling problem as you gave me the impression that magnetic > > induction current is proportional to wire length instead of enclosed > surface > > (~ L^2), while both engineering success and dimensional analysis show that > > it must be a L^2 law. > > In CGS EMU, self inductance has the units of L > This was about a remark to Sergey from last year's discussion "dynamic magnetic field is open" about the induction current which according to Faraday is proportional to magnetic flux change from u ~d(B.A)/dt. The idea that it is proportional to wire length can not be right, which is what I understood from Sergey's comments that the action of B on the wire (with length L) is what matters instead of the enclosed flux (with area ~L^2). Harald
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10f545,ef7eb0d662ead2d4 X-Google-Attributes: gid10f545,public X-Google-Thread: 106ae0,ef7eb0d662ead2d4 X-Google-Attributes: gid106ae0,public X-Google-Thread: 1110fe,ef7eb0d662ead2d4 X-Google-Attributes: gid1110fe,public X-Google-Thread: 1038c2,ef7eb0d662ead2d4 X-Google-Attributes: gid1038c2,public X-Google-Thread: 10b271,ef7eb0d662ead2d4 X-Google-Attributes: gid10b271,public X-Google-ArrivalTime: 2004-01-29 01:32:44 PST From: "Harry" <harald.vanlintel@epfl.ch> Newsgroups: sci.physics,sci.physics.electromag,alt.sci.physics.new-theories,fj.sci.matter,sci.physics.relativity References: <a42650fc.0312231529.65b841bd@posting.google.com> <slrnbvmv8g.93j.dubious@radioactivex.lebesque-al.net> <3ffbed28$1@epflnews.epfl.ch> <slrnbvpddm.dan.dubious@radioactivex.lebesque-al.net> <3ffd8ffa$1@epflnews.epfl.ch> <slrnbvraov.dan.dubious@radioactivex.lebesque-al.net> <3ffeb8b0$1@epflnews.epfl.ch> <slrnc06a45.8e.dubious@radioactivex.lebesque-al.net> <4003ff4f$1@epflnews.epfl.ch> <a42650fc.0401191437.384c3447@posting.google.com> <400cefe7$1@epflnews.epfl.ch> <a42650fc.0401271440.2f442ce1@posting.google.com> <4017b337$1@epflnews.epfl.ch> <bv9dkj$ecs$8@titan.btinternet.com> Subject: Re: New Year question from Leo Date: Thu, 29 Jan 2004 10:34:49 +0100 Lines: 33 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 NNTP-Posting-Host: imspc28.epfl.ch Message-ID: <4018d338$1@epflnews.epfl.ch> X-Trace: epflnews.epfl.ch 1075368760 128.178.153.55 (29 Jan 2004 10:32:40 +0200) Organization: EPFL Path: arc1-ca.pugleaf.net!archiver1.google.com!news2.google.com!news.maxwell.syr.edu!irazu.switch.ch!news-zh.switch.ch!switch.ch!epflnews.epfl.ch!not-for-mail