KIPS 9th Class Physical Quantities & Measurement Complete Notes


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These are the notes that are helpful even you belong to Federal Board, Lahore Board, Faisalabad Board, Rawalpindi Board, Sargodha Board, Wah Board.

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Title: Physical Quantities & Measurement

This is the introduction to Physical Quantities & Measurement. The chapter starts with a brief introduction of measurements and the various measuring devices used for them. The different SI units and their symbols are also explained in this chapter.

The chapter further tries to explain the significant figures of the numbers which are required for measurement. It also explains what accuracy and precision is and how they are important while doing any kind of measurement.

The first thing to do in any science is to identify the quantities we wish to explain. 
Every physical quantity is expressed as the product of a numerical value and a unit. Thus, the expression 5 m represents 5 metres, 25 kg represents 25 kilograms and so on. The numerical value of a physical quantity may be obtained by measurement. The unit for that particular physical quantity is defined arbitrarily and does not have a numerical value.

SI units: The SI or International System of Units is the most widely used system of units today. In this system, the fundamental or base units are used as the units for various other physical quantities. For example length is measured in metres, mass in kilograms and time in seconds.

CGS system: In this system, centimetre (cm), gram (g) and second (s) are used as base units for length, mass and time respectively.

Chapter: 1st Chapter of 9th Class Physics

FileSize: 3.8 MB

FileType: PDF

Pages: 18

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KIPS 9th Class Physical Quantities & Measurement Complete Notes


1: What is Science?
2: What is Physics?
3: What are the physical quantities?
4: What are the basic characteristics of physical quantities?
5: What are the base quantities?
6: What are the drive quantities?
7:  Why a standard unit is needed to measure a quantity correctly?
8: What do you know about International System of Units (SI)?
9: What are the base units?
10: What are derived units?
11: Why multiples and submultiples are used? Describe some standard prefixes, which are internationally used.
12: What do you know about prefixes?
13: How numbers are expressed in Scientific Notation?
14: What do you know about Meter Rule?
15: Explain the statement, “A micrometer screw gauge measures more accurately than
la vernier calipers".
16: What do you know about Lever Balance?
17: What is electronic balance? What is its range? And how mass is measured by using electronic balance?
18: What do you know about Measuring Tape?

The Short Questions With Answers In the Below Images


1: Define the branches of Physics.
2:  Explain the importance of Physics in daily life.
3: Write a note on Vernier Calipers.
4:  Write a note on the Screw Gauge
5:  What is Physical Balance? And how it is used?
6:  Which one of the following is the most accurate?
7: Write a note on the Stop Watch.
8:  What do you know about Measuring Cylinder? How is the volume of liquids measured?
by using this cylinder?
9:  Define and explain significant figures. What are the main points to be kept in mind while determining the significant figures of measurement?
10: Write down the rules to round off the numbers?
Beam balance, Physical Balance, And Electronic Balance

The Long Questions With Answers In the Below Images


1. The number of base units in SI are
2. Which one of the following is the smallest quantity?
3. The amount of a substance in terms of numbers is measured in:
4. An interval of 200 us is equivalent to
5. Which one of the following is the smallest quantity?
6. Which instrument is most suitable to measure the internal diameter of a test tube?
7. A student claimed the diameter of a wire as 1.032 using vernier calipers. Up to what extent do you agree with it?
8. A measuring cylinder is used to measure
9. A student noted the thickness of a glass sheet using a screw gauge. On the main scale, it reads 3 divisions while a 9th division on the circular scale coincides with index line. It's thickness is
10. Significant figures in an expression are
11. All the accurately known digits and the first doubtful digit
12. Identify the base quantity the following:

Short Questions

  1. What is the difference between base quantities and derived quantities?
  2. Pick out the base units in the following
  3. Find the base quantities involved in each of the following derived quantities
  4. Estimate your age in seconds.
  5. What role SI units have played in the development of science?
  6. What is meant by vernier constant?
  7. What do you understand by the zero error of a measuring instrument?
  8. What is a stopwatch? What is the least count of a mechanical stopwatch you have used in the laboratories
  9.  Why do we need to measure the extremely small interval of times?
  10. What is meant by significant figures of a measurement? 
  11. How is precision related to the significant figures in a measured quantity?

The Textbook Questions With Answers In the Below Images


  1. Express the following quantities using prefixes
  2. How do the prefixes micro, nano and pico relate to each other?
  3. Your hairs grow at the rate of 1mm per day. Find their growth rate in mms'
  4. Rewrite the following in standard form
  5. Write the following quantities in standard form.
  6. On closing the jaws of a vernier calipers, zero of the Vernier scale is on the right of it main scale such that 4" division of its vernier scale coincides with one of the main scale division. Find its zero error and Zero correction. 
  7. A screw gauge has 50 divisions on its circular scale. The pitch of the screw gauge is 0.5 mm. What is its least count?

The Numericals With Answers In the Below Images


The material presented here is to help students and for only the educational purpose. 



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Top Study World: KIPS 9th Class Physical Quantities & Measurement Complete Notes
KIPS 9th Class Physical Quantities & Measurement Complete Notes
Are you finding the MCQs, PDF, short questions, long questions, KIPS notes for the first chapter of Physical Quantities & Measurement? Then you have come to the right place.
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