## 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 Solved Numericals

• 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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### This Post Has 61 Comments

1. I need 9class physics numerical….. Plz sir upload kar dy…plzzzzz sir it’s my humbly request… Plz sir

2. This is very usefull espacially for students and i am a student and tomorrow is my paper of physics in school and i got help by these

3. it is a very helpfull notes…
Thsnkyou..

4. Sir u r really doing an awesome job. These notes r really so much helpful for us
Keep doing that great job!!!

5. Sir plz ajk text book baord muzafarabad, class 9th k physics k chapter k last, mean exrcise k solved notes mil sakty? And author dr.naeem khalid hai, aur dr. Shazia naeem

6. In chapter1 question 1.1 (iv)ka answer wrong hai or wrong nahi ha to play mujhe explain karo

7. It is very helpful notes for us.

8. Can i get these notes in urdu …

9. hello sir mujhay wo numerical chahye jo chap k end may ho

10. hand writing notes

11. these are very good notes. thank youuuuuuuuuuuu

12. Its owesome you are doing a good job sir

13. 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

1. 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.

2. answer nichy ha us swal k

14. sir plz,physic ka improtant chapter pta da plz

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

18. Kindly guide me about the quick quiz Q2!

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

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

21. i need a question answers physics of class 9

22. i need 10th class chemistry papers of 2013

23. i need a 9 class physics numerical soulation plz sir

1. yr muje 4th bi monthly ka important bata do plzzzzzzzzz

24. 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….

1. Yes you are right, there is little mistake in our notes.

25. guide us about quick quizes/…….

1. What do u want to know?

1. i want to know the nam ov authr of ths notes

1. Why do you want to know?

1. plzzzzzzzzzz tell me …..

26. 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

1. Kindly tell the question numbers of the incorrect answers.

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

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

1. 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.

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

1. Don’t just give answers, give explanation. Tell your doctors the explanation I have given you.

1. tentn is stess which is due to both of forces either they are oposite sides……. that is 200 netn

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

3. 2 forces lag rhi 100 newtn ki ……… mjy ap k anz ki samaj nai i

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

1. oky

2. 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.

27. 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 ???

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

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

1. yes