NEET 2025 Result Out - NEET Counselling: Ask Me Anything Q&A Live Session - 2 with Bharti Singh: https://youtube.com/live/aKokoqcFQFs NEET Physics 2025: Units And Measurement in One Mini Shot by Arshpreet Kaur!
In this video, Arshpreet Mam explains the basics of units and measurement. She starts by talking about physical quantities, which can be measured, like weight and length, and those that cannot be measured, like love.
Arshpreet Mam introduces the formula for expressing measurable quantities as ( n \times u ), where ( n ) is a number and ( u ) is the unit (like kilograms or grams). They explain that there are seven fundamental quantities: mass, length, time, temperature, luminous intensity, electric current, and amount of substance, each with its own unit.
The video also covers different systems of units, such as MKS (meters, kilograms, seconds), CGS (centimeters, grams, seconds), and FPS (feet, pounds, seconds). She explains how to convert between these units and introduces dimensional formulas, which help express physical quantities in terms of fundamental units.
She discusses dimensional analysis, which can check if equations are correct, derive relationships between quantities, and convert units. They also mention the limitations of dimensional analysis, such as when multiple quantities have the same dimensional formula.
Next, the video covers error analysis, explaining how to find true values, absolute errors, and relative errors in measurements. She emphasizes the importance of significant figures in calculations and rounding off numbers correctly.
Finally, Arshpreet Mam talks about tools like vernier calipers and screw gauges for precise measurements and provides a PDF with important formulas and dimensions for students to study.
Overall, the video is a helpful guide for understanding units, measurements, and how to work with them in science.
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