From d765c609f50a4d9131a43eab2d3b6de66de940af Mon Sep 17 00:00:00 2001
From: Claude Meny <claude.meny@irap.omp.eu>
Date: Sat, 9 Nov 2019 20:41:23 +0100
Subject: [PATCH] Update textbook.en.md

---
 .../intercambio-curso-electromagnetismo/textbook.en.md   | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md b/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md
index d257a7d3f..644b7567c 100644
--- a/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md
+++ b/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md
@@ -67,7 +67,14 @@ ES : **	constante magnética** = **permeabilidad del vacío**  <br>
 FR : **constante magnétique** = **perméabilité du vide** <br>
 EN : **magnetic constant** = **permeability of vacuum**
 
-**$`\vec{J_t}`$** = $`\vec{J_tot}`$ : <br>
+**$`\vec{J}`$** : <br>
+ES : **densidad de corriente (eléctrica)** <br>
+FR : **densité de courant (électrique de conduction)** = vecteur densité volumique de courant <br>
+EN : **(conduction) current density** = areic electric current
+$`\vec{J}=\dfrac{d\left(\sum_i q_i\;\vec{v_i}\right)}{d\tau}`$
+
+
+**$`\vec{J_t}`$** = $`\vec{J_{tot}}`$ : <br>
 ES : **densidad de corriente total** <br>
 FR : **densité de courant total** <br>
 EN : **total current density**