Gauss’s Law, Electric Flux & Applications | Class 12 Physics Chapter 1 | Part 4 | BBA

📘 DESCRIPTION (Long + SEO + High-Retention) Welcome back to Brain Booster Academy! This is Part 4 of Class 12 Physics Chapter 1 — Electric Charges & Fields, where we cover the MOST important concept of Electrostatics: Gauss’s Law. This lecture is aligned with NCERT Class 12 Physics (Pages 23–30) and perfect for Boards, JEE, NEET & CUET aspirants. 🔥 What You Will Learn in This Video (Part 4): 🔹 Electric Flux (Φ = EAcosθ) • Meaning of electric flux • NCERT definition • Positive, negative & zero flux • Flux through open vs closed surfaces 🔹 Gaussian Surface • Why choose symmetric surfaces • Sphere, cylinder, pillbox • How Gauss’s Law becomes easy with symmetry 🔹 Gauss’s Law (∮E·dA = Q/ε₀) • NCERT derivation • Physical meaning • “Only enclosed charge matters” 🔹 Applications of Gauss’s Law ✔ Electric field due to point charge ✔ Field due to infinite line charge ✔ Field due to infinite sheet (uniform field) ✔ Field inside a hollow conductor (zero field) 🔹 NCERT Derivations & Results • E ∝ 1/r² for point charge • E ∝ 1/r for line charge • E = σ/2ε₀ for infinite sheet • E = 0 inside conductor (JEE favorite) 🧠 Why Gauss’s Law Is Special? It converts hard integration problems into one-step solutions using symmetry. Iss law ke bina aap Electrostatics kabhi master nahi kar sakte. ❤️ Support This Free Series 👍 Like the video 💬 Comment “DOUBT” 🔗 Share with classmates 📌 Subscribe to BBA 📌 TAGS (Comma Separated) 🏷 HASHTAGS #gausslaw #electrostatics #class12physics #electricflux #jee #neet #bba #brainboosteracademy