Add SEM4 subjects and content

branch/electrical/SEM4/EE206/index.md

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+<div align = "center" style="color:orange">
+
+## 🔌 EE206 - Electrical Machine - I
+
+</div>
+
+<div align = "center">
+
+-  Introduces the fundamentals of electrical machines including Transformers, DC machines, and Induction Motors, focusing on their   construction, operating principles, performance characteristics, and applications in power systems.
+
+</div>
+
+---
+
+## 📚 Available Resources
+
+<div align="center">
+
+<PDFViewer :resources="[
+  { name: 'Syllabus', fileId: '17UO4ogUwU_vpS7-_uDvlG_Kk5tN5gU6U' },
+  { name: 'Transformer', fileId: '1H7xp1wl1JyDcPjE2nqWp47qr7C3nzMPe' },
+    { name: 'Rotating Machines', fileId: '1tZUW5bDce_QFyAZ6-UQc_blwtLy7f4IX' },
+    { name: 'DC Machines ', fileId: '1b5hRRnd7DGBIcXjN32pzsZ02vyd4ffbw' },
+     { name: 'Three Phase Induction Motor', fileId: '1-zSiOiG4X6D1dZiVBESy006a0SXW4Q8J' },
+]" />
+
+</div>
+
+## 📑 Available Pyqs
+
+<div align="center">
+
+|  #  | Resource         |             Access             |
+| :-: | :--------------- | :----------------------------: |
+|  1  | **Mid Semester** | [📥 Open](./PYQ/Mid-Semester/) |
+|  2  | **End Semester** | [📥 Open](./PYQ/End-Semester/) |
+
+</div>
+
+---
+
+## 📤 Contributing
+
+<details>
+<summary><b>How to add resources</b></summary>
+
+### Option A: Upload PDFs
+
+```
+CE102/
+├── CE102_Mid_2024.pdf
+├── CE102_End_2023.pdf
+└── CE102_Notes_TopicX.pdf
+```
+
+### Option B: Add Drive Links (Recommended)
+
+Add your Google Drive share link to the table above following the existing format.
+
+**📝 Naming Convention**
+
+- For exams: `CE102_Mid_YYYY.pdf` or `CE102_End_YYYY.pdf`
+- For notes: `CE102_Lecture#_Topic.pdf`
+- For assignments: `CE102_Assignment#_YYYY.pdf`
+
+> 💡 **Important:** Only add files you have permission to share
+
+</details>
+
+---
+
+<div align="center">
+
+**Need help?** Open an issue or contact the maintainers
+
+[← Back to SEM3](../)
+
+</div>

branch/electrical/SEM4/EE207/index.md

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+<div align = "center" style="color:orange">
+
+## ⚡EE207 - Power System - I
+
+</div>
+
+<div align = "center">
+
+- Covers the basics of electric power generation, transmission, and distribution, along with power system economics, transmission line parameters, and power delivery infrastructure.
+
+</div>
+
+---
+
+## 📚 Available Resources
+
+<div align="center">
+
+<PDFViewer :resources="[
+  { name: 'Syllabus', fileId: '1zo8mTBWyhuyqYWC4zgRHV7EMIn_cEX_4' },
+     { name: 'Introduction', fileId: '1ecbrVp0P68liotzJMvvGTR356wYm2-I4' },
+  { name: 'Transmission System', fileId: '1OcYWsFBQ9NC1mCQSVv9HqU-foH49Dc4n' },
+         { name: 'Three Phase Transmission Line', fileId: '1-zSiOiG4X6D1dZiVBESy006a0SXW4Q8J' },
+         { name: 'Insulators,Sag', fileId: '1zAgchFTMZ8F0hcqyx62tpoENzEbz6izi' },
+    { name: 'Assignment', fileId: '17dzDqTvXZ6V2t8NHKCUQFGYA92JexRqO' },
+     { name: 'Class notes', fileId: '1WvDHEt0HLHKh36mkKbcpJsYUFmlofYqk' },
+]" />
+
+</div>
+
+## 📑 Available Pyqs
+
+<div align="center">
+
+|  #  | Resource         |             Access             |
+| :-: | :--------------- | :----------------------------: |
+|  1  | **Mid Semester** | [📥 Open](./PYQ/Mid-Semester/) |
+|  2  | **End Semester** | [📥 Open](./PYQ/End-Semester/) |
+
+</div>
+
+---
+
+## 📤 Contributing
+
+<details>
+<summary><b>How to add resources</b></summary>
+
+### Option A: Upload PDFs
+
+```
+CE102/
+├── CE102_Mid_2024.pdf
+├── CE102_End_2023.pdf
+└── CE102_Notes_TopicX.pdf
+```
+
+### Option B: Add Drive Links (Recommended)
+
+Add your Google Drive share link to the table above following the existing format.
+
+**📝 Naming Convention**
+
+- For exams: `CE102_Mid_YYYY.pdf` or `CE102_End_YYYY.pdf`
+- For notes: `CE102_Lecture#_Topic.pdf`
+- For assignments: `CE102_Assignment#_YYYY.pdf`
+
+> 💡 **Important:** Only add files you have permission to share
+
+</details>
+
+---
+
+<div align="center">
+
+**Need help?** Open an issue or contact the maintainers
+
+[← Back to SEM3](../)
+
+</div>