Understand Uncertainty in Measurements from 9th Class Physics (PTCB New Syllabus 2025) 📏✨ Learn what uncertainty means, why it happens, and how to calculate it using the formula ± (Least Count ÷ 2). Includes real-life examples (ruler, vernier, micrometer, pendulum), diagrams, and step-by-step notes for easy learning. Based on Chapter 1: Physical Quantities & Measurements for PTCB students.
By Bilal Ansar
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