Chapter 2 -Units , Dimensions & Measurements

NEET level MOCK TEST -1- 45 QUESTIONS, with three levels of difficulty (question paper only , solutions are given at the end of course)

1) SI system of Units. Learn about the 7 fundamental units , valid throughtout the universe, that make up all other derived units and equations.

Scientists fixed these seven units as the Foundational Building Block of the measurement of physics phenomena .

As of now, humans do not know if there can be any 8th Fundamental Unit. We know only these 7. We stick with 7. These units apply throughout the Universe, not just on planet Earth. If you travel to any other planet or galaxy in the future, you should be able to do your physics work with these 7 units.

1. Length                             : [metre]
2. Mass                                 : [kilogram, kg]
3. Time                                 : [second,s]
4. Electric Current          : [Ampere , A]
5. Temperature                : [Kelvin, K]
6. Amount of Substance : [mole, mol]
7. Luminous Intensity    : [Candela, cd]

2) Conceptual Difference between Mass and Weight .

3) M,L,T Dimensions and checking validity of equations in general

4) Limitations of using Dimensions for verifying all kinds of equations

5) Dimensions derivation for Work Done

6) Dimensions derivation for Coefficient of Dynamic Viscosity (Stokes Law)

7) Dimensions – how to use it to deduce an equation for a paramater – TIME PERIOD of pendulum

8) Parallax error in measurements.

9) Errors in measurements

10) Vernier Caliper, Least Count, and how it is used to measure diameter, width, and depth in a practical machined part.

11) Solved Problems (HC Verma level)

12) NEET UG MOCK TEST-1- Solutions