Physical Quantities and Measurement MCQs

by
  1. Physics is the study of:
    A) Living organisms
    B) Matter, energy and their interactions
    C) Plants only
    D) Earth layers
    Answer: B
  2. A physical quantity is:
    A) A mathematical equation
    B) Anything that can be measured
    C) A force only
    D) A unit
    Answer: B
  3. Every physical quantity consists of:
    A) Magnitude only
    B) Unit only
    C) Magnitude and unit
    D) Formula only
    Answer: C
  4. SI stands for:
    A) Scientific Institution
    B) System International
    C) International System of Units
    D) Standard Index
    Answer: C
  5. The SI unit of length is:
    A) Centimeter
    B) Meter
    C) Kilometer
    D) Inch
    Answer: B
  6. The SI unit of mass is:
    A) Gram
    B) Kilogram
    C) Pound
    D) Tonne
    Answer: B
  7. The SI unit of time is:
    A) Minute
    B) Hour
    C) Second
    D) Day
    Answer: C
  8. Which is a base quantity?
    A) Velocity
    B) Area
    C) Mass
    D) Force
    Answer: C
  9. The SI unit of temperature is:
    A) Celsius
    B) Fahrenheit
    C) Kelvin
    D) Degree
    Answer: C
  10. Which instrument measures length accurately?
    A) Measuring cylinder
    B) Meter rule
    C) Thermometer
    D) Stopwatch
    Answer: B
  11. Vernier calipers are used to measure:
    A) Temperature
    B) Small lengths precisely
    C) Time
    D) Mass
    Answer: B
  12. Screw gauge measures:
    A) Distance between cities
    B) Thickness of small objects
    C) Weight
    D) Volume
    Answer: B
  13. The least count of a meter rule is:
    A) 1 cm
    B) 0.1 cm
    C) 1 mm
    D) 0.01 mm
    Answer: C
  14. The least count of a vernier caliper is generally:
    A) 0.1 cm
    B) 0.01 cm
    C) 1 cm
    D) 1 mm
    Answer: B
  15. A stopwatch measures:
    A) Mass
    B) Temperature
    C) Time interval
    D) Force
    Answer: C
  16. Which is a derived quantity?
    A) Length
    B) Time
    C) Area
    D) Mass
    Answer: C
  17. The SI unit of area is:
    A) m
    B) m²
    C) cm²
    D) km²
    Answer: B
  18. The SI unit of volume is:
    A) m²
    B) cm³
    C) m³
    D) litre
    Answer: C
  19. Speed is a:
    A) Base quantity
    B) Derived quantity
    C) Fundamental quantity
    D) Scalar unit
    Answer: B
  20. Density is defined as:
    A) Mass × Volume
    B) Volume / Mass
    C) Mass / Volume
    D) Area / Volume
    Answer: C
  21. SI unit of density is:
    A) g/cm³
    B) kg/m³
    C) kg/cm³
    D) N/m³
    Answer: B
  22. One kilometer equals:
    A) 100 m
    B) 1000 m
    C) 10 m
    D) 10000 m
    Answer: B
  23. One millimeter equals:
    A) 10⁻³ m
    B) 10⁻² m
    C) 10⁻⁶ m
    D) 10⁻¹ m
    Answer: A
  24. Which prefix represents 10⁻³?
    A) Mega
    B) Milli
    C) Kilo
    D) Micro
    Answer: B
  25. Kilo means:
    A) 10²
    B) 10³
    C) 10⁶
    D) 10⁻³
    Answer: B
  26. Micro represents:
    A) 10⁻⁶
    B) 10⁻⁹
    C) 10⁻³
    D) 10⁶
    Answer: A
  27. Nano means:
    A) 10⁻⁶
    B) 10⁻⁹
    C) 10³
    D) 10⁹
    Answer: B
  28. The SI unit of force is:
    A) Joule
    B) Newton
    C) Watt
    D) Pascal
    Answer: B
  29. The SI unit of energy is:
    A) Watt
    B) Newton
    C) Joule
    D) Pascal
    Answer: C
  30. The SI unit of power is:
    A) Joule
    B) Newton
    C) Watt
    D) Ampere
    Answer: C
  31. Error in measurement can be reduced by:
    A) Guessing values
    B) Repeating measurements
    C) Ignoring units
    D) Using old instruments
    Answer: B
  32. Random errors are minimized by:
    A) Averaging readings
    B) Increasing mistakes
    C) Ignoring data
    D) Using wrong scale
    Answer: A
  33. A systematic error occurs due to:
    A) Faulty instrument
    B) Chance variations
    C) Human memory
    D) Temperature only
    Answer: A
  34. Which is a scalar quantity?
    A) Velocity
    B) Force
    C) Speed
    D) Displacement
    Answer: C
  35. Which is a vector quantity?
    A) Distance
    B) Speed
    C) Mass
    D) Velocity
    Answer: D
  36. Significant figures indicate:
    A) Unit conversion
    B) Precision of measurement
    C) Time interval
    D) Error percentage
    Answer: B
  37. 0.00520 has how many significant figures?
    A) 2
    B) 3
    C) 4
    D) 5
    Answer: B
  38. The SI unit of electric current is:
    A) Volt
    B) Coulomb
    C) Ampere
    D) Watt
    Answer: C
  39. The SI unit of luminous intensity is:
    A) Candela
    B) Mole
    C) Kelvin
    D) Joule
    Answer: A
  40. The SI unit of amount of substance is:
    A) Mole
    B) Gram
    C) Kilogram
    D) Candela
    Answer: A
    Numerical and Formula-Based MCQs
  41. Density = ?
    A) Volume/Mass
    B) Mass × Volume
    C) Mass/Volume
    D) Area × Mass
    Answer: C
  42. A body has mass 20 kg and volume 4 m³. Density is:
    A) 5 kg/m³
    B) 80 kg/m³
    C) 24 kg/m³
    D) 16 kg/m³
    Answer: A
  43. Area of a rectangle 5 m × 4 m is:
    A) 9 m²
    B) 20 m²
    C) 25 m²
    D) 40 m²
    Answer: B
  44. Volume of a cube with side 2 m is:
    A) 4 m³
    B) 6 m³
    C) 8 m³
    D) 10 m³
    Answer: C
  45. A distance of 3 km equals:
    A) 300 m
    B) 3000 m
    C) 30 m
    D) 30000 m
    Answer: B
  46. 5000 g equals:
    A) 0.5 kg
    B) 5 kg
    C) 50 kg
    D) 500 kg
    Answer: B
  47. One hour equals:
    A) 3600 s
    B) 600 s
    C) 60 s
    D) 1000 s
    Answer: A
  48. Volume = Length × Breadth × ?
    A) Radius
    B) Height
    C) Area
    D) Diameter
    Answer: B
  49. A box has dimensions 2 m × 3 m × 4 m. Volume is:
    A) 9 m³
    B) 24 m³
    C) 12 m³
    D) 18 m³
    Answer: B
  50. Density of water is approximately:
    A) 100 kg/m³
    B) 1000 kg/m³
    C) 10 kg/m³
    D) 500 kg/m³
    Answer: B
  51. Convert 2.5 m into cm:
    A) 25 cm
    B) 250 cm
    C) 2500 cm
    D) 2 cm
    Answer: B
  52. 0.02 m equals:
    A) 2 mm
    B) 20 mm
    C) 200 mm
    D) 0.2 mm
    Answer: B
  53. A cylinder contains 200 cm³ water. In m³ it is:
    A) 2×10⁻⁴ m³
    B) 2×10⁻³ m³
    C) 2×10⁻⁵ m³
    D) 2×10⁻² m³
    Answer: A
  54. 1 kg = __ g
    A) 10
    B) 100
    C) 1000
    D) 10000
    Answer: C
  55. Formula for area of square is:
    A) 2πr
    B) Side²
    C) Length × Breadth × Height
    D) πr²
    Answer: B
  56. A square of side 6 cm has area:
    A) 12 cm²
    B) 24 cm²
    C) 36 cm²
    D) 42 cm²
    Answer: C
  57. Volume of cube side 5 cm:
    A) 25 cm³
    B) 50 cm³
    C) 125 cm³
    D) 250 cm³
    Answer: C
  58. If mass = 12 kg and volume = 3 m³, density is:
    A) 3 kg/m³
    B) 4 kg/m³
    C) 6 kg/m³
    D) 9 kg/m³
    Answer: B
  59. Prefix mega means:
    A) 10⁻⁶
    B) 10³
    C) 10⁶
    D) 10⁹
    Answer: C
  60. One micrometer equals:
    A) 10⁻³ m
    B) 10⁻⁶ m
    C) 10⁻⁹ m
    D) 10⁻² m
    Answer: B
  61. Which quantity has unit m/s?
    A) Force
    B) Velocity
    C) Area
    D) Density
    Answer: B
  62. Which quantity has unit m²?
    A) Area
    B) Volume
    C) Speed
    D) Mass
    Answer: A
  63. Which quantity has unit m³?
    A) Area
    B) Length
    C) Volume
    D) Speed
    Answer: C
  64. A reading affected by observer’s eye position is called:
    A) Random error
    B) Systematic error
    C) Parallax error
    D) Absolute error
    Answer: C
  65. The smallest reading measurable by an instrument is called:
    A) Range
    B) Scale
    C) Least count
    D) Precision
    Answer: C
  66. Precision refers to:
    A) Closeness of repeated measurements
    B) Correctness only
    C) SI units
    D) Formula
    Answer: A
  67. Accuracy means:
    A) Repeated values
    B) Nearness to true value
    C) Least count
    D) Average value
    Answer: B
  68. Which device measures diameter of a wire?
    A) Meter rule
    B) Screw gauge
    C) Stopwatch
    D) Thermometer
    Answer: B
  69. One litre equals:
    A) 10⁻³ m³
    B) 10⁻² m³
    C) 1 m³
    D) 100 m³
    Answer: A
  70. One day contains:
    A) 3600 s
    B) 7200 s
    C) 86400 s
    D) 100000 s
    Answer: C
  71. Which quantity is fundamental?
    A) Force
    B) Speed
    C) Length
    D) Density
    Answer: C
  72. Force is measured in:
    A) Joule
    B) Newton
    C) Watt
    D) Pascal
    Answer: B
  73. Pressure is measured in:
    A) Pascal
    B) Joule
    C) Newton
    D) Watt
    Answer: A
  74. Energy is measured in:
    A) Newton
    B) Joule
    C) Watt
    D) Kelvin
    Answer: B
  75. Power is measured in:
    A) Watt
    B) Newton
    C) Joule
    D) Pascal
    Answer: A
  76. 2 hours equal:
    A) 7200 s
    B) 3600 s
    C) 1800 s
    D) 1200 s
    Answer: A
  77. 250 cm equals:
    A) 0.25 m
    B) 2.5 m
    C) 25 m
    D) 2500 m
    Answer: B
  78. Which unit is derived?
    A) Kilogram
    B) Second
    C) Newton
    D) Kelvin
    Answer: C
  79. SI system contains:
    A) 5 base quantities
    B) 6 base quantities
    C) 7 base quantities
    D) 8 base quantities
    Answer: C
  80. Meter is the unit of:
    A) Area
    B) Length
    C) Mass
    D) Time
    Answer: B
  81. The formula for density is:
    A) V/M
    B) M×V
    C) M/V
    D) A/V
    Answer: C
  82. If density = 8 kg/m³ and volume = 2 m³, mass is:
    A) 4 kg
    B) 8 kg
    C) 16 kg
    D) 20 kg
    Answer: C
  83. Which instrument measures temperature?
    A) Thermometer
    B) Balance
    C) Stopwatch
    D) Vernier caliper
    Answer: A
  84. Which instrument measures mass?
    A) Measuring cylinder
    B) Beam balance
    C) Stopwatch
    D) Screw gauge
    Answer: B
  85. Unit of frequency is:
    A) Hertz
    B) Newton
    C) Watt
    D) Pascal
    Answer: A
  86. 1 MHz equals:
    A) 10³ Hz
    B) 10⁶ Hz
    C) 10⁹ Hz
    D) 10² Hz
    Answer: B
  87. Unit of electric current is:
    A) Volt
    B) Ampere
    C) Ohm
    D) Coulomb
    Answer: B
  88. Which quantity is measured in Kelvin?
    A) Pressure
    B) Temperature
    C) Force
    D) Power
    Answer: B
  89. Unit of amount of substance is:
    A) Candela
    B) Mole
    C) Kelvin
    D) Joule
    Answer: B
  90. Candela measures:
    A) Temperature
    B) Electric current
    C) Luminous intensity
    D) Pressure
    Answer: C
  91. Scientific notation of 1000000 is:
    A) 10⁻⁶
    B) 10⁶
    C) 10³
    D) 10⁹
    Answer: B
  92. Which prefix represents 10⁹?
    A) Mega
    B) Nano
    C) Giga
    D) Milli
    Answer: C
  93. Which is not a base quantity?
    A) Length
    B) Mass
    C) Time
    D) Velocity
    Answer: D
  94. A quantity having only magnitude is:
    A) Vector
    B) Scalar
    C) Derived
    D) Fundamental
    Answer: B
  95. Speed is:
    A) Scalar quantity
    B) Vector quantity
    C) Fundamental quantity
    D) Base unit
    Answer: A
  96. Velocity is:
    A) Scalar quantity
    B) Vector quantity
    C) Base quantity
    D) Unit
    Answer: B
  97. The SI unit of volume is:
    A) m²
    B) cm³
    C) m³
    D) litre
    Answer: C
  98. Which instrument measures liquid volume?
    A) Measuring cylinder
    B) Beam balance
    C) Stopwatch
    D) Thermometer
    Answer: A
  99. If a quantity can be expressed by base quantities, it is called:
    A) Scalar quantity
    B) Derived quantity
    C) Unit
    D) Prefix
    Answer: B
  100. The internationally accepted system of units is:
    A) FPS system
    B) CGS system
    C) SI system
    D) British system
    Answer: C

Leave a Comment