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