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+# 1.
+![[1 Cours Electromagn 2026.pdf]]
+
+# 2.
+![[2 Cours Transformateur 2026.pdf]]
+
+## Exercice 1.1:
+![[Pasted image 20260413093212.png]]
+
+### 1. 
+$R=0.5\Omega/km\times1.5km\times2$  ($\times2$ car il y a deux cables) 
+$R=1.5\Omega$.
+
+$V_1=RI+V_{R}e$ 
+$V_1=1.5\Omega\,150A+230V=455.5V$
+
+### 2.
+$P=V_RI=RII=RI^2$ 
+$P=1.5\times150^2=33.75kW$
+
+### 3.
+$\frac{n_2}{n_1}=\frac{V_2}{V_1}=\frac{1}{25}=\frac{I_1}{I_2}\implies I_1=\frac{I_2}{25}=6A$
+$P_R=RI_1^2=1.5\times6^2=54kW$
+
+### 4.
+$V_1=25V_2=25\times230=5750V$
+$V_{1P}=V_1+RI_1=5750V+1.5\times6$
+$V_{1P}=5759V$
+$\frac{V_{1P}}{V_P}=m\implies V_P=\frac{V_{1P}}{m}=\frac{5759}{25}=230.36V$
+
+## Exercice 1.2:
+![[Pasted image 20260413100403.png]]
+### 1.
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