Gravitational Field Strength & Variation of g | Class 12 Physics| Federal Board --- In this comprehensive one-shot lecture, we explore the concept of *Gravitational Field Strength* and how *gravitational acceleration (g)* varies with *altitude* and *on the surface of the Earth**. This lecture is aligned with **Chapter 15 – Gravitation* from the *Federal Board Class 12 Physics 2025* syllabus and is also helpful for students of **Punjab, Sindh, KPK, and Balochistan Boards**. 🎯 *What You Will Learn in This Video:* ✔️ Definition & Formula of Gravitational Field Strength ✔️ $g = \frac{GM}{r^2}$ — Derivation and Concept ✔️ SI Unit and Dimensions of g ✔️ *Variation of g with Altitude* ✔️ *Value of g on Earth’s Surface* ✔️ Earth’s Shape and Rotation Effects on g ✔️ Graphical Representation of Field Strength ✔️ Conceptual MCQs + Board Numericals ✔️ Real-life Applications (e.g. satellite motion, gravity near Earth, etc.) This video is ideal for revision, board preparation, and deep understanding of core concepts. It includes both *concept-based* and *numerical-based* learning for scoring high in board exams. 📂 *More Chapters – Complete Playlist Links:* 📘 *Class 12 Physics Lectures:* \[. • Class 12 Physics Federal Board ] 📘 *Chapter 15 Gravitation:* \[. • Gravitation Unit 15 Class 12 Physics Feder... ] --- 📲 *Join Our Community:* 🔔 *WhatsApp Channel for Free Notes, Test Alerts, MCQs & More:* 👉 [Join WhatsApp Channel](. https://whatsapp.com/channel/0029VaR1...) 📘 *Facebook:* \[. / 199r23obuj ] 📷 *Instagram:* \[. https://www.instagram.com/pakistan_dy...] 📺 *Subscribe Now:* \[. / @pakistandynamicwala09 ] *Telegram:* \[. https://t.me/pakistandynamicwala] *Tiktok* [https://www.tiktok.com/@pakistandynam...] `#GravitationalFieldStrength` `#VariationOfg` `#Class12Physics` `#FBISEPhysics2025` `#FederalBoardPhysics` `#PhysicsBoardPreparation` #federalboard #fbise #variationofg #nationalbookfoundation #class12physics #pakistandynamicwala Class 12 Physics Gravitation Gravitational field strength derivation Variation of g with height Federal Board Class 12 Physics Chapter 15 Gravitation full lecture g value on Earth Satellite motion and gravity One shot lecture Physics Physics 2025 new syllabus Class 12 MCQs and numericals gravitation