JEE||NEET|| Board||The Secret to How Transformers Change Voltage Without Changing Power CH.7 AC XII

In this lecture, we cover the complete theory and concepts of Transformers from Class 12 Physics (Alternating Current - Lecture 11). Learn the working principle of mutual induction, the detailed differences between Step-Up and Step-Down Transformers, turns ratio, voltage-current relations, core construction, and power conservation equations for Board exams and competitive entrance preparation. ⏱️ Timestamps / Chapters 00:00 - Introduction & Overview of Transformer 01:46 - What is a Transformer? (Definition & Purpose) 04:30 - Types of Transformers: Step-Up Transformer 07:45 - Types of Transformers: Step-Down Transformer 10:08 - Principle of Transformer (Mutual Induction & Faraday's Law) 12:38 - Construction & Working (Primary & Secondary Coils, Iron Core) 20:08 - Mathematical Derivation & EMF Equations ($E_p$ & $E_s$) 22:38 - Transformation Ratio / Turns Ratio ($R$) 24:25 - Power & Efficiency Equation ($I_p V_p = I_s V_s$) 26:00 - Summary & Next Topics 📚 Related Topics Covered: Alternating Current (AC) Class 12 Physics Working principle based on Mutual Induction Step-Up vs. Step-Down Transformer turns & voltage relations Efficiency and ideal transformer equations 🏷️ Hashtags: #Class12Physics #Transformer #AlternatingCurrent #PhysicsClass12 #StepUpTransformer #StepDownTransformer #BoardExam2027 #ApexStudyCentre