Class 9 Physics Chapter 1 – Physical Quantities and Measurement MCQs (FBISE) - MCQs

Description: Practice Class 9 Physics Chapter 1 Physical Quantities and 28Measurement MCQs according to the latest FBISE syllabus. These exam-oriented multiple-choice questions cover physical quantities, SI units, prefixes, scientific notation, measuring instruments, least count, accuracy, precision, and significant figures.

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1. Physics is the branch of science that mainly deals with:

A) Matter, energy, and their interactions
B) Living organisms
C) Chemical reactions only
D) Earth’s history

2. A measurable property of a body is called a:

A) Constant
B) Formula
C) Physical quantity
D) Hypothesis

3. Which of the following is a base quantity in SI?

A) Force
B) Mass
C) Pressure
D) Energy

4. The SI unit of length is:

A) Centimeter
B) Foot
C) Kilometer
D) Meter

5. The SI unit of mass is:

A) Kilogram
B) Gram
C) Pound
D) Newton

6. Which instrument is commonly used to measure length accurately?

A) Stopwatch
B) Beam balance
C) Meter rule
D) Thermometer

7. The least count of an instrument is:

A) Its maximum reading
B) The smallest value it can measure
C) Its average reading
D) Its zero error

8. Which instrument is used to measure very small diameters?

A) Meter rule
B) Measuring tape
C) Spring balance
D) Micrometer screw gauge

9. Vernier calipers are mainly used to measure:

A) Internal and external diameters accurately
B) Temperature
C) Electric current
D) Weight

10. The SI unit of time is:

A) Minute
B) Second
C) Hour
D) Day

11. Which prefix represents $10^{-3}$ ?

A) Kilo
B) Mega
C) Milli
D) Micro

12. Which prefix represents $10^3$ ?

A) Kilo
B) Centi
C) Milli
D) Nano

13. One kilometer is equal to:

A) 10 m
B) 100 m
C) 10000 m
D) 1000 m

14. Scientific notation is mainly used to express:

A) Angles
B) Very large or very small numbers
C) Temperatures only
D) Speeds only

15. Accuracy refers to how close a measured value is to the:

A) Average value
B) Estimated value
C) True value
D) Rounded value

16. Precision means:

A) Measurements are always correct
B) Measurement has no unit
C) Reading is taken once
D) Repeated measurements are close to each other

17. Which instrument is most suitable for measuring the thickness of a wire?

A) Micrometer screw gauge
B) Measuring tape
C) Meter rule
D) Stopwatch

18. Which of the following is a derived physical quantity?

A) Length
B) Speed
C) Time
D) Mass

19. The SI unit of area is:

A) Meter
B) Cubic meter
C) Centimeter square
D) Square meter ( $m^2$ )

20. The SI unit of volume is:

A) Cubic meter ( $m^3$ )
B) Liter
C) Square meter
D) Cubic centimeter only

21. Which instrument is commonly used to measure mass in a laboratory?

A) Spring balance
B) Stopwatch
C) Beam balance
D) Thermometer

22. One millimeter is equal to:

A) $10^{-2}$ m
B) $10^{-3}$ m
C) $10^{-6}$ m
D) $10^{3}$ m

23. The prefix “micro” $(\mu)$ represents:

A) $10^{-3}$
B) $10^{-2}$
C) $10^{-9}$
D) $10^{-6}$

24. Which quantity can be measured using a stopwatch?

A) Time interval
B) Mass
C) Temperature
D) Force

25. The least count of a measuring instrument determines its:

A) Weight
B) Cost
C) Precision of measurement
D) Length

26. Which instrument is best for measuring the external diameter of a metal rod accurately?

A) Measuring tape
B) Vernier calipers
C) Stopwatch
D) Spring balance

27. Significant figures indicate the:

A) Unit of a quantity
B) Formula used
C) Number of experiments
D) Reliability and precision of a measurement

28. The SI base unit of electric current is:

A) Ampere
B) Volt
C) Coulomb
D) Ohm

29. Which of the following is written correctly in scientific notation?

A) $25 \times 10^4$
B) $0.35 \times 10^8$
C) $3.5 \times 10^7$
D) $15.2 \times 10^3$

30. The SI unit of temperature is:

A) Degree Celsius
B) Kelvin
C) Fahrenheit
D) Joule

31. Zero error in an instrument affects the:

A) Colour of the instrument
B) Unit of measurement
C) Shape of the object
D) Accuracy of measurement

32. Which quantity is expressed in kilograms?

A) Mass
B) Weight
C) Force
D) Density

33. One micrometer is equal to:

A) $10^{-3}$ m
B) $10^{-6}$ m
C) $10^{-9}$ m
D) $10^{6}$ m

34. Repeating a measurement several times mainly helps to:

A) Change the unit
B) Increase the least count
C) Reduce random errors and improve reliability
D) Eliminate the need for instruments

35. Which SI prefix represents $10^9$ ?

A) Mega
B) Giga
C) Nano
D) Pico

36. The SI base unit of luminous intensity is:

A) Candela
B) Lumen
C) Lux
D) Watt

37. Which of the following is NOT an SI base quantity?

A) Length
B) Time
C) Mass
D) Speed

38. The SI unit of amount of substance is:

A) Gram
B) Kilogram
C) Mole
D) Liter

39. The least count of a typical meter rule is:

A) 1 cm
B) 1 mm
C) 0.01 mm
D) 1 m

40. Which instrument is most suitable for measuring the internal diameter of a test tube?

A) Vernier calipers
B) Meter rule
C) Measuring tape
D) Stopwatch

41. The value $5.2 \times 10^{-3}$ is equal to:

A) 520
B) 0.52
C) 0.0052
D) 52.0

42. Which one of the following helps reduce parallax error?

A) Using a longer scale
B) Measuring twice
C) Changing the unit
D) Keeping the eye vertically above the mark

43. The SI unit of electric current is named after:

A) André-Marie Ampère
B) Isaac Newton
C) James Watt
D) Albert Einstein

44. Which of the following is a derived SI unit?

A) Meter
B) Newton
C) Kilogram
D) Second

45. A measurement written as 12.50 cm contains:

A) 2 significant figures
B) 3 significant figures
C) 1 significant figure
D) 4 significant figures

46. Which of the following prefixes represents $10^{-9}$ ?

A) Milli
B) Micro
C) Nano
D) Pico

47. Which characteristic of an instrument indicates the smallest division it can read?

A) Least count
B) Range
C) Capacity
D) Sensitivity only

48. The SI unit of force is:

A) Joule
B) Newton
C) Pascal
D) Watt

49. Which of the following best describes an SI unit?

A) A unit used in one country only
B) A traditional unit
C) A unit used only in laboratories
D) An internationally accepted standard unit

50. The main purpose of adopting the International System of Units (SI) is to:

A) Maintain uniformity in measurements worldwide
B) Replace all measuring instruments
C) Increase the size of measurements
D) Eliminate the need for calculations

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