Electric Field Due to Infinitely Long Straight Charged Wire | Gauss Law | Class 12 Physics (Tamil)

In this video, we learn how to derive the electric field due to an infinitely long straight uniformly charged wire using Gauss's Law. This is a very important application of Gauss Law for Class 12 Physics students preparing for State Board, CBSE, NEET, and JEE exams. | We cover: Uniform linear charge density (\lambda) Understanding Cylindrical Symmetry Choosing the correct Gaussian Surface (Coaxial Cylinder) Calculating Electric Flux and applying Gauss's Law Why the electric field is proportional to 1/r (unlike point charges) Explained clearly in Tamil! Don't forget to like, share, and subscribe for more Class 12 Physics derivations and tutorials. 5. Video Chapters Add these to your description so students can easily navigate to the specific part of the derivation they need to revise. YouTube will automatically turn these into clickable chapters. 00:00 - Introduction & Linear Charge Density (\lambda) 00:45 - Cylindrical Symmetry & Electric Field Direction 02:00 - Cancellation of Vertical Components 02:49 - Choosing the Gaussian Surface (Cylinder) 03:37 - Why Flux Through Cylinder Caps is Zero 04:04 - Calculating Flux Through the Curved Surface 04:18 - Applying Gauss's Law & Enclosed Charge 04:55 - Pro Tip: Inside vs. Outside Charge in Gauss Law 05:35 - Final Formula: 1/r vs 1/r^2 Dependence 06:12 - Conclusion & Next Video Preview