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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 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.

Click 9th Class Physics Notes for other chapter’s notes

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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Aleezey
7 years ago

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 ???

barbe doll
7 years ago

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

barbe doll
7 years ago

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

ayesha
7 years ago

ayesha
7 years ago

i cant get the notes ooooooo

iqra naz
7 years ago

sir please give me chap:2 (kinematics) notes

asdf
7 years ago

Thanks for such nice notes. weldone

mary
7 years ago

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