Units and Measurements Quiz

Beginner to Confidence Level | Suitable for Classes 9, 10 & 11 | CBSE-Oriented Physics Practice

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Instructions

• Total Questions: 30
• This quiz covers only fundamental and beginner-friendly concepts from Units and Measurements.
• Read each question carefully and answer neatly.
• No numerical calculations or advanced derivations are included.
• The answer key is provided at the end for self-check and concept revision.

Section A — Multiple Choice Questions

Foundation Level

1. Measurement is the process of:
   (A) guessing the value of a quantity

   (B) comparing an unknown quantity with a standard

   (C) changing one unit into another

   (D) adding two physical quantities
2. Which of the following is a physical quantity?
   (A) sweetness

   (B) honesty

   (C) length

   (D) beauty
3. Which of the following is a fundamental (base) quantity?
   (A) speed

   (B) force

   (C) mass

   (D) energy
4. Which of the following is a derived quantity?
   (A) time

   (B) temperature

   (C) electric current

   (D) pressure
5. The SI base unit of length is:
   (A) centimetre

   (B) metre

   (C) kilometre

   (D) inch
6. Which system of units uses centimetre, gram and second as its basic units?
   (A) SI

   (B) MKS

   (C) CGS

   (D) FPS
7. Which of the following is an SI derived unit?
   (A) kilogram

   (B) second

   (C) newton

   (D) kelvin
8. Which prefix represents 10⁻⁶?
   (A) milli

   (B) micro

   (C) nano

   (D) mega
9. Which instrument is most suitable for measuring the diameter of a thin wire?
   (A) meter scale

   (B) screw gauge

   (C) thermometer

   (D) stopwatch
10. The least count of an instrument is:
    (A) the largest value measured by it

    (B) the mass of the instrument

    (C) the smallest value that can be measured by it

    (D) the error in the instrument
11. The dimensions of a physical quantity tell us:
    (A) its colour and shape

    (B) the powers of base quantities involved in it

    (C) its exact numerical value

    (D) the instrument used to measure it
12. Which of the following is the correct scientific notation of 0.00045?
    (A) 45 × 10⁻⁵

    (B) 4.5 × 10⁻⁴

    (C) 0.45 × 10⁻³

    (D) 450 × 10⁻⁶

Section B — True / False

Building Confidence

13. Every measurement consists of a numerical value and a unit. ________
14. Mass and time are fundamental quantities. ________
15. Area is a fundamental quantity. ________
16. Vernier caliper can be used to measure the internal diameter of a hollow tube. ________
17. Accuracy and precision always mean exactly the same thing. ________
18. Reaction time while using a stopwatch can cause an error in measurement. ________

Section C — Fill in the Blanks

Concept Practice

19. The SI base unit of temperature is ____________________.
20. The SI unit of electric charge is ____________________.
21. A commonly used unit in daily life for measuring liquid quantity is ____________________.
22. 1 kilometre = ____________________ metre.
23. The digits that are meaningfully known in a measurement are called ____________________.

Section D — Match the Following

Confidence Booster

24. Match the physical quantity with its correct SI derived unit.

    Column A	Column B
    (a) Force	(i) Joule
    (b) Energy	(ii) Coulomb
    (c) Pressure	(iii) Pascal
    (d) Power	(iv) Volt
    (e) Potential Difference	(v) Watt
    (f) Electric Charge	(vi) Newton

25. Match the prefix with its power of ten.

    Column A	Column B
    (a) milli	(i) 106
    (b) centi	(ii) 10−9
    (c) kilo	(iii) 10−6
    (d) mega	(iv) 10−2
    (e) micro	(v) 103
    (f) nano	(vi) 10−3

26. Match the instrument with the most appropriate measurement.

    Column A	Column B
    (a) Meter scale	(i) Thickness of a wire
    (b) Vernier caliper	(ii) Temperature of water
    (c) Screw gauge	(iii) Mass of a body
    (d) Stopwatch	(iv) Length of a notebook
    (e) Thermometer	(v) Time interval
    (f) Balance	(vi) Diameter of a coin

Section E — Full Form Questions

Exam-Oriented

27. Write the full form of SI.
28. Write the full form of CGS.
29. Write the full form of FPS.
30. Write the full form of MKS.

Answer Key with One-Line Explanations

Teacher use: You may print only the first part for students and keep this section separately for checking or discussion.

1. (B) Measurement means comparing an unknown quantity with a fixed standard unit.
2. (C) Length is measurable and is therefore a physical quantity.
3. (C) Mass is a base quantity and does not depend on other quantities.
4. (D) Pressure is derived from force and area, so it is a derived quantity.
5. (B) Metre is the SI base unit used for measuring length.
6. (C) CGS stands for centimetre–gram–second system.
7. (C) Newton is a derived SI unit used for force.
8. (B) Micro represents one-millionth, that is 10⁻⁶.
9. (B) A screw gauge is used to measure very small diameters or thicknesses accurately.
10. (C) Least count is the smallest measurement an instrument can read.
11. (B) Dimensions show how a quantity depends on base quantities like length, mass and time.
12. (B) In scientific notation, one non-zero digit is placed before the decimal point.
13. True Every proper measurement is written using a number and a unit.
14. True Mass and time are both fundamental physical quantities.
15. False Area is derived from length × length, so it is not fundamental.
16. True Vernier caliper can measure internal diameter using its inner jaws.
17. False Accuracy means closeness to the true value, while precision means closeness among repeated values.
18. True Human reaction delay while starting or stopping a stopwatch introduces error.
19. kelvin Kelvin is the SI base unit of temperature.
20. coulomb Coulomb is the SI unit used for electric charge.
21. litre Litre is commonly used in daily life for milk, petrol and other liquids.
22. 1000 One kilometre contains 1000 metres.
23. significant figures Significant figures are the meaningful digits in a measured value.
24. 24. (a)–(vi), (b)–(i), (c)–(iii), (d)–(v), (e)–(iv), (f)–(ii) — these are standard SI derived unit pairs.
25. 25. (a)–(vi), (b)–(iv), (c)–(v), (d)–(i), (e)–(iii), (f)–(ii) — prefixes represent powers of ten used in unit conversion.
26. 26. (a)–(iv), (b)–(vi), (c)–(i), (d)–(v), (e)–(ii), (f)–(iii) — each instrument is matched with its most suitable use.
27. SI = International System of Units It is the globally accepted standard system of units.
28. CGS = Centimetre–Gram–Second It is an older metric system based on cm, g and s.
29. FPS = Foot–Pound–Second It is a system based on foot, pound and second.
30. MKS = Metre–Kilogram–Second It is a metric system based on metre, kilogram and second.

This quiz is designed to strengthen basic concepts, improve confidence, and prepare students for school tests, worksheets, viva questions, and foundation-level competitive exams.