Sample Quizzes For Preparation: Physical Quantities and Measurement Techniques
1. Which instrument is most suitable for measuring the diameter of a thin wire accurately?
A. Ruler
B. Measuring tape
C. Vernier calipers
D. Micrometer screw gauge
2. What is the best method to measure the volume of an irregular solid?
A. Using a ruler and applying the volume formula
B. Using a measuring cylinder with displacement method
C. Using a digital scale
D. Using vernier calipers
3. Which of the following is a scalar quantity?
A. Velocity
B. Force
C. Acceleration
D. Temperature
4. Which physical quantity has both magnitude and direction?
A. Distance
B. Time
C. Mass
D. Displacement
5. Which tool would you use to measure the internal diameter of a test tube precisely?
A. Ruler
B. Vernier calipers
C. Tape measure
D. Micrometer
6. Which of the following is not a vector quantity?
A. Momentum
B. Electric field strength
C. Energy
D. Weight
7. Which device would you use to measure a time interval of 0.01 seconds?
A. Wall clock
B. Stopwatch
C. Pendulum
D. Digital timer
8. What is the SI unit of mass?
A. Newton
B. Kilogram
C. Gram
D. Pound
9. What is the resultant vector when two perpendicular vectors of magnitude 3 N and 4 N are combined?
A. 5 N
B. 7 N
C. 1 N
D. 12 N
10. Which of the following instruments is best for measuring a 1.25 cm thick sheet?
A. Meter rule
B. Vernier calipers
C. Measuring tape
D. Beam balance
11. Which of these is a vector quantity?
A. Speed
B. Mass
C. Time
D. Velocity
12. Which of the following quantities is a scalar?
A. Force
B. Acceleration
C. Time
D. Displacement
13. Which of the following can be used to measure volume directly?
A. Thermometer
B. Ruler
C. Measuring cylinder
D. Vernier calipers
14. What is the function of the zero error check on a micrometer screw gauge?
A. To calibrate speed
B. To improve mass accuracy
C. To correct initial reading error
D. To determine volume
15. The term “vector quantity” refers to a quantity that has:
A. Only magnitude
B. Only direction
C. Both magnitude and direction
D. Neither magnitude nor direction
16. What is the most accurate way to measure a thin piece of aluminum foil’s thickness?
A. Vernier calipers
B. Ruler
C. Micrometer screw gauge
D. Measuring tape
17. Which physical quantity is measured using a force meter?
A. Mass
B. Volume
C. Weight
D. Length
18. What is used to determine the volume of a liquid?
A. Beam balance
B. Measuring tape
C. Measuring cylinder
D. Stop clock
19. Which is the most appropriate device to measure the time of one pendulum oscillation?
A. Wall clock
B. Stopwatch
C. Wristwatch
D. Thermometer
20. What unit is used for measuring acceleration?
A. m/s
B. m/s²
C. kg
D. N
21. Which quantity is defined as the rate of change of velocity?
A. Speed
B. Displacement
C. Acceleration
D. Distance
22. Which instrument would you use to measure the length of a classroom accurately?
A. Micrometer screw gauge
B. Ruler
C. Measuring tape
D. Vernier calipers
23. Which instrument can provide a measurement precision of 0.01 mm?
A. Ruler
B. Vernier calipers
C. Measuring tape
D. Micrometer screw gauge
24. Which vector quantity is measured in newtons?
A. Force
B. Time
C. Speed
D. Energy
25. Which of the following best describes scalar quantities?
A. Magnitude only
B. Direction only
C. Both magnitude and direction
D. No magnitude and no direction
26. What does a measuring cylinder primarily measure?
A. Temperature
B. Mass
C. Time
D. Volume
27. A resultant vector is the:
A. Sum of scalar quantities
B. Average of all vector magnitudes
C. Vector sum of two or more vectors
D. Difference of two scalars
28. Which of the following is not a method of vector addition?
A. Parallelogram method
B. Head-to-tail method
C. Algebraic method
D. Scalar product method
29. The angle between two vectors added by the perpendicular method is:
A. 30°
B. 60°
C. 90°
D. 120°
30. What unit is used for energy in SI system?
A. Watt
B. Pascal
C. Joule
D. Newton
Answer Key with Explanations:
- D – Micrometer screw gauge provides high-precision measurement for small diameters. Others are less precise.
- B – Displacement in measuring cylinder is used for irregular shapes. A applies only to regular solids.
- D – Temperature is scalar as it has magnitude but no direction.
- D – Displacement is vector; others are scalar quantities.
- B – Vernier calipers are precise for internal diameters.
- C – Energy is scalar; all others are vector quantities.
- D – Digital timers are ideal for precise, short time intervals.
- B – The SI unit of mass is kilogram (kg).
- A – Resultant = √(3² + 4²) = 5 N (Pythagoras theorem).
- B – Vernier calipers have suitable precision for such thickness.
- D – Velocity includes magnitude and direction; others do not.
- C – Time is scalar; others are vectors.
- C – Measuring cylinder is used directly for volume.
- C – Zero error ensures correct readings by adjusting for any offset.
- C – Vectors have both magnitude and direction.
- C – Micrometer screw gauge is the most precise.
- C – Weight is force; measured using a force meter.
- C – Measuring cylinder is the standard tool for volume.
- B – Stopwatch gives precise timing needed for oscillations.
- B – Acceleration has units m/s².
- C – Defined as change in velocity over time.
- C – Measuring tape is ideal for long measurements.
- D – Micrometer screw gauge has highest precision among options.
- A – Force is measured in newtons (N).
- A – Scalars have only magnitude.
- D – Measuring cylinders measure liquid volumes.
- C – Vector sum gives the resultant of multiple vectors.
- D – Scalar product is a dot product, not a method of vector addition.
- C – Perpendicular vectors form a 90° angle.
- C – Joule (J) is the SI unit of energy.