CHAPTER 01 - PHYSICAL QUANTITIES & MEASUREMENT | 9TH PHYSICS NOTES

Qasim Tariq 11-01-2020Notes


After studying this unit, the students will be able to:

  • describe the crucial role of Physics in Science, Technology and Society.
  • explain with examples that Science is based on physical quantities which consist of numerical magnitude and a unit.
  • differentiate between base and derived physical quantities.
  • list the seven units of System International (SI) alongwith their symbols and physical quantities (standard definitions of SI units are not required).
  • interconvert the prefixes and their symbols to indicate multiples and sub-multiples for both base and derived units.
  • write the answer in scientific notation in measurements and calculations. describe the working of Vernier Callipers and screw gauge for measuring length.
  • identify and explain the limitations of measuring instruments such as metre rule, Vernier Callipers and screw gauge.
  • describe the need using significant figures for recording and stating results in the laboratory.


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  • 9th Physics Notes
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  • Matric Notes
  • Class IX Helping Notes
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  • Matric Part-1 Notes

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