Introduction
The first live class of the NDA/CDS 2 2026 Physics course was designed to build a strong conceptual foundation by introducing the chapter Units and Dimensions, one of the most important topics in the Physics syllabus. Since questions from this chapter are frequently asked in NDA and CDS examinations, the primary objective of the session was to help students understand the fundamental concepts rather than rely on rote memorization. The class emphasized conceptual clarity, exam-oriented thinking, and systematic problem-solving through carefully selected multiple-choice questions.
The session began with a discussion on the importance of Units and Dimensions in Physics and their relevance in competitive examinations. Students were introduced to the SI system of units, fundamental and derived quantities, and the significance of dimensional formulae in understanding physical quantities. Special emphasis was placed on differentiating between dimensions and units, as this is a commonly tested concept in defence examinations.
After establishing the theoretical concepts, the class focused on dimensional analysis and its practical applications, including checking the correctness of physical equations, deriving relations among physical quantities, and converting units from one system to another. Short tricks and logical approaches were explained to help students solve questions quickly and accurately during the examination.
A significant portion of the class was devoted to solving a variety of MCQs based on previous years’ NDA and CDS examination patterns. Each question was discussed in detail, with emphasis on identifying the correct approach, eliminating incorrect options, and avoiding common mistakes. Students were encouraged to actively participate by attempting questions before the explanations, thereby improving their analytical and decision-making skills.
Throughout the session, continuous interaction was maintained with the students to address conceptual doubts and reinforce important ideas. The teaching methodology combined conceptual explanations, practical examples, shortcut techniques, and exam-oriented practice to ensure better retention and confidence among the learners.
Conclusion
The first class successfully established a strong conceptual base in Units and Dimensions, enabling students to understand one of the most fundamental chapters of Physics. By integrating theory with extensive MCQ practice, the session enhanced students’ conceptual understanding, problem-solving ability, and examination readiness. This foundation will support the study of upcoming Physics topics and help students develop a systematic approach toward achieving success in the NDA/CDS 2 2026 examination.
