Semiconductor Class 12 | Energy Bands, Band Theory & Intrinsic Semiconductor

This video explains the Semiconductor and Electronic Devices chapter from Class 12 Physics with a clear board-exam approach, covering all fundamental concepts asked in CBSE, ISC, State Boards & CUET. 📌 Topics Covered: Energy Levels in Atoms – Discrete energy levels – Formation of energy bands in solids Band Theory of Solids – Valence band, conduction band & forbidden energy gap – Significance of band gap Classification of Materials Based on Resistivity – Conductors – Semiconductors – Insulators – Comparison using energy band diagrams Intrinsic Semiconductor – Definition and characteristics – Pure silicon and germanium – Electron–hole pair formation – Temperature dependence of conductivity