In message <[email protected]>, dated Thu, 30 Sep 2010, Bill Owsley <[email protected]> writes:
>At frequencies above audio, the current loop is along the path of least >impedance, which in not where one might look for it. At all frequencies: there is nothing magic about 9 kHz, or 20 kHz or 200 kHz (depending on how 'hi' you want your 'fi'). What does vary with frequency is the relative impedance of various possible current paths. At low frequencies (whatever they are), the current follows the path of least resistance, because the inductive reactance is much smaller than the resistance. At high frequencies, the inductance dominates, and the lowest inductance path has the lowest loop area. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK If at first you don't succeed, delegate. But I support unbloated email http://www.asciiribbon.org/ - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
