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M3P2
Courses
Commits
8afea38b
Commit
8afea38b
authored
Nov 18, 2025
by
Claude Meny
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Update cheatsheet.fr.md
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12.temporary_ins/90.electromagnetism-in-vacuum/40.maxwell-quasi-stationary-fields-approximation/cheatsheet.fr.md
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8afea38b
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@@ -131,11 +131,11 @@ soit :
...
@@ -131,11 +131,11 @@ soit :
!!!
*Exemples :*
!!!
*Exemples :*
!!! Un circuit de taille caractéritique $
`L`
$ est parcouru par un courant harmonique de fréquence $
`\nu`
$.
!!! Un circuit de taille caractéritique $
`L`
$ est parcouru par un courant harmonique de fréquence $
`\nu`
$.
!!!
!!!
!!!
* Si *
$
`\nu = 50\,Hz`
$
*
, fréquence
du réseau européen d'élecricité
, alors $
`L`
$ doit vérifier :
!!!
* Si *
$
`\nu = 50\,Hz`
$
*
, fréquence
standard pour le réseau électrique domestique européen
, alors $
`L`
$ doit vérifier :
!!!
`\boldsymbol{\mathbf{L\ll \lambda = \dfrac{c}{\nu}=\dfrac{3\cdot<10^8\,ms^{-1}}{50\,s^{-1}}=6000 km}}`
$
*
!!!
`\boldsymbol{\mathbf{L\ll \lambda = \dfrac{c}{\nu}=\dfrac{3\cdot<10^8\,ms^{-1}}{50\,s^{-1}}=6000 km}}`
$
*
!!!
!!!
!!!
* Si *
$
`\nu = 3\,GHz`
$
*
, alors $
`L`
$ doit vérifier :
!!!
* Si *
$
`\nu = 3\,GHz`
$
*
, alors $
`L`
$ doit vérifier :
!!!
`\boldsymbol{\mathbf{L\ll \lambda = \dfrac{c}{\nu}=\dfrac{3\cdot<10^8\,ms^{-1}}{3\cdot<10^9\,s^{-1}}=10 cm}}`
$
*
!!!
*$
`\boldsymbol{\mathbf{L\ll \lambda = \dfrac{c}{\nu}=\dfrac{3\cdot<10^8\,ms^{-1}}{3\cdot<10^9\,s^{-1}}=10 cm}}`$*
##### Comment le visualiser ?
##### Comment le visualiser ?
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