Update cheatsheet.fr.md

12.temporary_ins/20.magnetostatics-vacuum/10.effects-stationary-magnetic-field/20.overview/cheatsheet.fr.md

@@ -158,7 +158,9 @@ $`\quad\quad\Longrightarrow \overrightarrow{dF_{mag}}= \dens_{libre} \cdot d\tau
 
 * On nomme **force de Laplace** cette *force magnétique $`\overrightarrow{dF_B}`$ exercée sur chaque élément $`dC`$* du circuit :   
 <br>
-**$`\mathbf{\overrightarrow{dF}_{Laplace}}`$**$`\begin{align}\;
+**$`\mathbf{\overrightarrow{dF}_{Laplace}}`$**
+
+$`\begin{align}\color{brown}{\mathbf{\overrightarrow{dF}_{Laplace}}}
 &= \dens_{libre} \cdot \underbrace{d\tau}_{\color{blue}{\;\;=\\dS\,dl}} 
 \cdot (\overrightarrow{v}_{dér\,/\,dC} \wedge \overrightarrow{B})\\
 \\
@@ -166,7 +168,9 @@ $`\quad\quad\Longrightarrow \overrightarrow{dF_{mag}}= \dens_{libre} \cdot d\tau
    \cdot \underbrace{dS}_{\color{blue}{\vec{dS}\parallel\vec{v}}}
    \cdot \underbrace{dl}_{\color{blue}{\vec{dl}\parallel\vec{v}}}) \wedge \overrightarrow{B}\\
 \\
-&= \underbrace{\overrightarrow{j}_{cond}\cdot\overrightarrow{dS}}_{\color{blue}{=\,I}}\;\overrightarrow{dl}\wedge\overrightarrow{B}
+&= \underbrace{\overrightarrow{j}_{cond}\cdot\overrightarrow{dS}}_{\color{blue}{=\,I}}\;\overrightarrow{dl}\wedge\overrightarrow{B}\\
+\\
+&\color{brown}\mathbf{=I\,\overrightarrow{dl}\wedge\overrightarrow{B}}}
 \end{align}`$