Commit 568b0695 authored by Claude Meny's avatar Claude Meny

Update textbook.en.md

parent 4cc9152d
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......@@ -320,13 +320,13 @@ S.I. : $`A \cdot m`$
EN : $`\vec{dH_M}=\dfrac{1}{4\pi}\cdot\dfrac{I\cdot\vec{dl}_P\times\vec{PM}}{||\vec{PM}||^3}`$
$`\vec{dH_M}`$ : magnetic field vector (S.I. unit : $À\cdot m^{-1}`$ or $`A/m`$)
$`\vec{dB_M}`$ : flux density (S.I. unit : $`T`$)
Dans le vide :
$`\vec{dB_M}`$ : flux density or magnetic field induction vector (S.I. unit : $`T`$)
$`\vec{dH}=\dfrac{1}{4\pi}\cdot\dfrac{I\cdot\vec{dl}\times\vec{r}}{r^3}=\dfrac{1}{4\pi}\cdot\dfrac{I\cdot\vec{dl}\times\vec{e_r}}{r^2}`$
, avec $`\vec{e_r}=\dfrac{\vec{r}}{||\vec{r}||}=\dfrac{\vec{r}}{r}`$
car $`\vec{r}=r\;\vec{e_r}`$ avec $`r>0`$ .
Dans le vide :
LA : $`\vec{dB_M}=\dfrac{\mu_0}{4\pi}\cdot\dfrac{I\cdot\vec{dl}_P\times\vec{PM}}{||\vec{PM}||^3}`$
......
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