Class 11th Physics Units and measurements | Conversion of System units || Lecture 03

For Question practicle click on the link given below https://drive.google.com/file/d/1hPes... telegram channel link https://t.me/mindmakerclasses2026 This lecture covers the practical application of Dimensional Analysis: converting a physical quantity from one system of units to another (e.g., MKS to CGS). ​Here is the breakdown of the concepts explained in the video to help your students follow along: ​Lecture Overview: Conversion of Systems of Units ​This session focuses on using the principle that while the numerical value of a physical quantity changes when you switch unit systems, its dimensions remain constant. The core formula derived and used throughout the lesson. ​Timeline & Key Topics ​[00:06] Introduction to Dimensional Analysis Applications: Recap of dimension properties and the concept of physical quantity Q = n \times u. ​[03:08] Deriving the Conversion Formula: Step-by-step mathematical derivation of the formula used to convert between two different unit systems. ​[05:59] Example 1: Force (Newtons to Dynes): Converting force from the MKS system to the CGS system using the dimensional formula [MLT^{-2}]. ​[11:20] Example 2: Work Done (Joules to Ergs): Applying the conversion formula to Work using the dimensional formula [ML^2T^{-2}]. ​[16:42] Example 3: Defining New Units of Energy: Solving for a custom unit system where mass, time, and gravity are pre-defined. ​[23:06] Example 4: Density in a Custom System: Calculating density in a hypothetical system of units where length and mass are defined differently from standard systems. For Question practicle click on the link given below