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PTB 9th Class Physics Chapter 1 Solved Questions and Numericals Problems

View and Download the solved questions, solved numerical problems or 9th Class Physics notes of Chapter 1 “Physical Quantities and Measurement” of Punjab Textbook Board. These 9th class physics notes of 1st Chapter are according to the new syllabus (2013) of Punjab Boards including Lahore Board, Gujranwala Board, Sahiwal Board, Rawalpindi Board, Faisalabad Board, Multan Board, Bahawalpur Board, Federal Board, DG Khan Board and Sargodha Board. Students of 9th Class of all these board can facilitate from the physics notes given below. You can also download  9th Class Physics Chapter 1 Solved Questions and Numericals Problems.

Unit 1: Physical Quantities and Measurements

By studying this chapter 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.

9th Class Physics Chapter 1 Short Question Answers

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9th Class Physics Chapter 1 Solved Numericals

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Correction and Comments about Numericals and Short Question Answers

  • Short Question 1.8
    Problem: Wrong answer given in notes.
    Correct Answer:  It is the measurement or value that an instrument shows when it should be showing zero.
  • Short Question 1.9
    Problem: Wrong answer given in notes.
    Correct Answer: By knowing the zero error, necessary correction can be made to find correct measurement. Otherwise our reading will be incorrect.
  • Numerical 1.7
    Problem : Wrong values of pitch of the screw guage(0.1mm) and number of division(100).
    Correction:  The vale of pitch of the screw should be 0.5mm and number of divisions should be 50 according to the question. There is no change in answer, it remains the same.


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These solved numerical problems and question answer are explain properly and we hope that students will not find any difficult or confusion in these notes. But if students have any type of question or query regarding 9th Class Physics Notes, Solved Question Answers and Solved Numerical problems, then they can ask us by commenting below in the comment section.

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  1. asheq ali says:

    these are very good notes. thank youuuuuuuuuuuu

  2. Umer sultan says:

    Its owesome you are doing a good job sir

  3. waqar says:

    Sir plz is question ka answer day dein find the base quntities involved in each of the following derived quntities a)speed b)volume c)force d)work give answer

    • admin says:

      a) Speed
      Formula: distance/time
      so in speed length and time are the base quantities.

      b) Volume
      volume is actually cube of length so length is the base quantity in volume.

      c) Force
      Formula: mass*acceleration = mass * (velocity/time) = mass*(displacement/time)(1/time)
      So mass, length and time are the base quantities in Force.

      d) Work
      Formula: Force*displacement
      so mass, length and time are the base quantities in Work.

  4. danish says:

    sir plz,physic ka improtant chapter pta da plz

  5. styloofari says:

    satisfactory answerz

  6. Amir says:

    Dear Sir! you doing a wonderful task i love it
    thanks for provide this

  7. Mannaj tariq says:

    please upload video lecture of 9th and metric class practicals

  8. Robina says:

    Kindly guide me about the quick quiz Q2!

  9. Daniyal says:

    sir ye ab new tab mein open he nahi hota or nahi full screen mein plz repair

  10. burhan says:

    sir plz ap mujy 9 class ki physics k chapter 1 ki mini exercises aur quik quize b send kr den?

  11. burhan says:

    i need a question answers physics of class 9

  12. anas says:

    i need 10th class chemistry papers of 2013

  13. hafsa shahid says:

    i need a 9 class physics numerical soulation plz sir

  14. rania says:

    tell me about chapter 1 problm 1.7 …… too much confusing…… pitch of scre is .5mm .no ov divisns is 50….. simply divide pich by no ov divisn…. 4m ur notes i cant understnd it….

  15. madiha says:

    guide us about quick quizes/…….

  16. madiha says:

    plzzzzzz guide us about quick quizes of 9th class……… and i found mistakes in chapter 3 mcq and 1 short qustn……. correct it…… nd thnxxxxxxx 4 great notes…… Allah bless u

    • admin says:

      Kindly tell the question numbers of the incorrect answers.

      • madiha says:

        chapter 3 qustn 3.8 tentn in roop………. its anz iz nt 100….

        • madiha says:

          if it iz 100 then plzzzzzzzzzz tell how…… i discuss this qustn 2 my teachrz….. nd finally i found correct ans that iz 200

          • admin says:

            It is 100N, let me explain it by an example. Consider a block weighing 100N attached to a string, the other end of the string is attached to a roof, now the block is stationery it means that there is force equal and opposite to the weight of the box (according to Newton’s third law of motion). So the tension in the string is 100N equal to the weight of the box.

            • madiha says:

              no its iz 200 newtn…….. tentin is due to both of forces that iz 200n……. 3 phd doctrs reply me 200 netn/……..

            • madiha says:

              plzzzzzzzzzzzzzz ap is ko again search kry or discuss kry apny teachrz sy……

            • madiha says:

              2 forces lag rhi 100 newtn ki ……… mjy ap k anz ki samaj nai i

            • madiha says:

              forces 100 100 ki dono sides py to????????????????????? m toooooooooo much confusedddddd……. plzzzzzzzzzzzzzzzzzz guide me…………..

              • Javeria Haroon says:

                Madiha admin sahi keh rahay hain. Jab koi box kisi support se hang hota hai tab bhi us ki string pe dono taraf se 100N ki opposite force lag rahi hoti hai lekin ham tension box k weight k equal letay hain. Haan agar dono forces same direction mai hoti tu tab 200N tension hoti.

  17. Aleezey says:

    sir plz kya mjhy physics ki 10th ki PTB,lahore k notes mil skty hain new edition hai,
    n 9th k baqi chaps kb uplaod hngy ???

  18. barbe doll says:

    sir plz ap mujy 9 class ki physics k chapter 1 ki mini exercises aur quik quize b send kr den?

  19. barbe doll says:

    sir please mujy unit”physical quntities and mesurement”k n0tes email k thr0ugh send kr den

  20. ayesha says:

    notes r not loading oooooooooooooooo

  21. ayesha says:

    i cant get the notes ooooooo

  22. iqra naz says:

    sir please give me chap:2 (kinematics) notes

  23. asdf says:

    Thanks for such nice notes. weldone

  24. mary says:

    yup.this is quite useful but plz try it 2 make a little more clear

  25. muhammad ishfaq tahir says:

    these notes are very good

  26. umer says:

    i need a 10 class physic numarical soulation

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