20 Essential Measurement MCQ Questions : Grade 11 Physics

Grade 11 students must thoroughly study the Physics unit on Measurement because it forms the foundation of all physics concepts they will encounter in both Grade 11 and Grade 12, as well as in the national examinations. Accurate measurement and correct use of SI units such as time, length, mass, and force are essential for understanding motion, mechanics, electricity, waves, and modern physics. Topics like velocity, acceleration, force (newton), energy, pressure, and even microscopic concepts involving micro (µ) and nano (n) scales all rely on precise unit conversion and dimensional consistency. Without a strong grasp of measurement, students struggle with calculations, problem-solving, and interpreting experimental data. In national examinations, a significant number of questions test unit conversion directly or assess it indirectly through calculations, making measurement skills critical for scoring well. Mastery of this unit therefore equips students with the accuracy, confidence, and analytical skills required to succeed across the entire senior physics syllabus and in high-stakes examinations.

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1. How many seconds are there in 2.5 minutes?

A. 125 s
B. 150 s
C. 250 s
D. 60 s

2. Convert 3.6 km into meters.

A. 360 m
B. 3,600 m
C. 36,000 m
D. 360,000 m

3. Which of the following is equal to 0.75 kg?

A. 75 g
B. 750 g
C. 7,500 g
D. 0.075 g

4. The SI prefix micro (µ) represents:

A. 10⁻³
B. 10⁻⁶
C. 10⁻⁹
D. 10⁶

5. One nanometer (nm) is equal to:

A. 10⁻³ m
B. 10⁻⁶ m
C. 10⁻⁹ m
D. 10⁹ m

6. Convert 450 cm into meters.

A. 0.45 m
B. 4.5 m
C. 45 m
D. 450 m

7. A reaction lasts 2,500 ms. What is this in seconds?

A. 0.25 s
B. 2.5 s
C. 25 s
D. 250 s

8. Convert 2.4 mg into micrograms (µg).

A. 24 µg
B. 240 µg
C. 2,400 µg
D. 24,000 µg

9. “A force of 1 newton is equivalent to 1 kg·m/s².”

A. False
B. Sometimes true
C. True
D. Only true on Earth

10. What is the SI unit of force?

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

11. Which of the following is the largest quantity?

A. 5 mm
B. 5 µm
C. 5 nm
D. 5 cm

12. Convert 6,000 nm to micrometers (µm).

A. 0.006 µm
B. 0.06 µm
C. 6 µm
D. 600 µm

13. How many milliseconds are in 0.4 seconds?

A. 4 ms
B. 40 ms
C. 400 ms
D. 4,000 ms

14. Convert 1.2 × 10³ g into kilograms.

A. 0.012 kg
B. 0.12 kg
C. 1.2 kg
D. 12 kg

15. “Nano is a smaller SI prefix than micro.”

A. False
B. Only for length
C. True
D. Only for mass

16. A 2 kg object accelerates at 3 m/s². What is the force?

A. 1.5 N
B. 5 N
C. 6 N
D. 12 N

17. Convert 0.00045 m into micrometers (µm).

A. 0.45 µm
B. 4.5 µm
C. 45 µm
D. 450 µm

18. Which conversion is correct?

A. 1 km = 100 m
B. 1 g = 10⁻³ kg
C. 1 ms = 10⁻⁶ s
D. 1 µm = 10⁻⁹ m

19. Which of the following equals 3.2 × 10⁻⁶ m?

A. 3.2 mm
B. 3.2 µm
C. 3.2 nm
D. 32 µm

20. Which SI base quantities are used to define the newton?

A. Length only
B. Mass only
C. Time only
D. Mass, length, and time