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Federal (FBISE) · Chapter test · Free

9th Class General Science Chapter 8 Test08. Measurement

27 marks · 40 minutes · 18 questions. Covers: 08. Measurement.

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9th Class General Science Chapter 8 Test

9th Class · General Science · Federal (FBISE)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 27Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 7 × 1 = 7)

  1. The least count of analog stopwatch is:
    1. 0.01 s
    2. 0.1 s
    3. 1 s
    4. 10 s
  2. Which of the following is not a derived unit?
    1. pascal
    2. newton
    3. kelvin
    4. joule
  3. The unit of weight in terms of base units is:
    1. kg m s⁻²
    2. kg m⁻¹ s⁻²
    3. kg m s⁻¹
    4. kg m⁻¹ s⁻¹
  4. The product of 4.513 and 7.21, up to correct number of significant figures is:
    1. 32.6
    2. 32.5
    3. 32.53
    4. 32.54
  5. The number 4.53567 is rounded off to three significant figures as:
    1. 4.53
    2. 4.53
    3. 4.5
    4. 4.6
  6. The unit of momentum (which is product of mass and velocity) in terms of base units is:
    1. kg m s⁻¹
    2. kg m s⁻²
    3. kg m⁻¹ s⁻¹
    4. kg m s
  7. The least count of meter rule is:
    1. 0.01 mm
    2. 0.1 mm
    3. 1 mm
    4. 10 mm

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

  1. Round off the following numbers up to three significant digits: a)4.527 b) 12.832
  2. What precautions should be taken for taking length measurement using meter rule? Elaborate those precautions.
  3. Find the result of given operations of numbers up to correct number of significant figures: 45.2 × 8.6
  4. Find out the units of a physical quantity named torque, which is the product of force and displacement, in terms of base units.
  5. Find the sum of the following numbers up to correct number of significant figures. 4.5 and 8.32
  6. Find the sum of the following numbers up to correct number of significant figures. 12.36 and 89.7
  7. Round off the following numbers up to three significant digits: a) 93.251 b) 7.675
  8. Explain the rules of rounding off the numbers.

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

  1. Discuss the difference between base and derived physical quantities.
  2. Why we round off the numbers? What rules are to be followed for it?
  3. Justify that the physical quantities can be categorized into two types, scalar and vector.