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By Swati Singh
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Updated on 6 Oct 2025, 17:27 IST
Class 11 Physics Chapter 2 – Units and Measurements MCQs with answers are available here. These questions are prepared as per the latest CBSE syllabus and NCERT guidelines. Practicing these chapter-wise MCQs will help students strengthen their understanding and score well in exams. The Units and Measurements Class 11 Physics MCQs are designed to clarify key concepts and allow students to test their knowledge and accuracy within a given time frame.
Check out multiple-choice questions from Chapter 2, Units and Measurements. Each question includes four options, out of which only one is correct. Students must select the right answer and verify it with the solutions provided here.
1. The branch of Physics that deals with measurement of physical quantities is called
a) Metrology
b) Morphology
c) Astrology
d) Chronology
Answer: a) Metrology
2. The SI system of units is based on how many fundamental quantities?
a) 5
b) 6
c) 7
d) 8
Answer: c) 7
3. Which of the following is NOT a fundamental quantity?
a) Length
b) Mass
c) Velocity
d) Time
Answer: c) Velocity
4. The SI unit of luminous intensity is
a) Lux
b) Candela
c) Lumen
d) Watt
Answer: b) Candela
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5. Which of the following is a derived unit?
a) Kilogram
b) Meter
c) Second
d) Newton
Answer: d) Newton
6. Which of the following has dimensions of force?
a) MLT⁻²
b) ML²T⁻²
c) MLT⁻¹
d) ML⁻¹T⁻²
Answer: a) MLT⁻²
7. Dimensional formula of work is
a) [MLT⁻²]
b) [ML²T⁻²]
c) [MLT⁻¹]
d) [M⁰L⁰T⁰]
Answer: b) [ML²T⁻²]
8. The SI unit of pressure is
a) Pascal
b) Bar
c) Newton
d) Joule
Answer: a) Pascal
9. Which one of the following pairs has the same dimensions?
a) Work and Torque
b) Pressure and Energy
c) Momentum and Work
d) Power and Energy
Answer: a) Work and Torque
10. What is the dimensional formula of Planck’s constant (h)?
a) [ML²T⁻¹]
b) [ML²T⁻²]
c) [MLT⁻¹]
d) [ML²T⁻³]
Answer: a) [ML²T⁻¹]
11. Which of the following is not dimensionless?
a) Refractive index
b) Strain
c) Angle
d) Speed
Answer: d) Speed
12. SI unit of frequency is
a) Hertz
b) Newton
c) Joule
d) Watt
Answer: a) Hertz
13. SI unit of force is
a) Joule
b) Pascal
c) Newton
d) Watt
Answer: c) Newton
14. The SI unit of electric current is
a) Coulomb
b) Ampere
c) Volt
d) Ohm
Answer: b) Ampere
15. Which physical quantity has the unit "kg·m²/s²"?
a) Force
b) Work/Energy
c) Pressure
d) Power
Answer: b) Work/Energy
16. Which physical quantity has the unit "J/s"?
a) Force
b) Work
c) Power
d) Momentum
Answer: c) Power
17. Which of these is not an SI base unit?
a) Kilogram
b) Meter
c) Second
d) Calorie
Answer: d) Calorie
18. Which of the following has dimensions [M⁰L⁰T⁰]?
a) Work
b) Refractive index
c) Power
d) Velocity
Answer: b) Refractive index
19. Which of these is a dimensionless constant?
a) Gravitational constant
b) Planck’s constant
c) Fine-structure constant
d) Boltzmann constant
Answer: c) Fine-structure constant
20. What is the dimensional formula of velocity?
a) [LT⁻¹]
b) [LT⁻²]
c) [L²T⁻¹]
d) [L⁰T⁻¹]
Answer: a) [LT⁻¹]
21. Which of the following is NOT a derived physical quantity?
a) Work
b) Mass
c) Power
d) Pressure
Answer: b) Mass
22. Which of the following has the same dimensional formula?
a) Stress and Pressure
b) Velocity and Acceleration
c) Power and Force
d) Energy and Momentum
Answer: a) Stress and Pressure
23. Which of the following has different dimensions?
a) Impulse
b) Momentum
c) Force × Time
d) Work
Answer: d) Work
24. SI unit of energy is
a) Joule
b) Watt
c) Newton
d) Henry
Answer: a) Joule
25. SI unit of torque is
a) Nm
b) N/m
c) Joule
d) Pascal
Answer: a) Nm
26. Which physical quantity has the unit "N·s"?
a) Energy
b) Momentum
c) Power
d) Pressure
Answer: b) Momentum
27. Which of the following is dimensionally correct?
a) Force = Mass × Acceleration
b) Work = Force × Time
c) Pressure = Energy × Distance
d) Power = Work × Time
Answer: a) Force = Mass × Acceleration
28. Which of the following methods is used to check correctness of an equation?
a) Dimensional analysis
b) Unit conversion
c) Integration
d) Differentiation
Answer: a) Dimensional analysis
29. Which of these cannot be derived using dimensional analysis?
a) Value of constant
b) Checking correctness of formula
c) Conversion of units
d) Deriving relation between physical quantities
Answer: a) Value of constant
30. Which physical quantity has unit "kg·m/s"?
a) Energy
b) Force
c) Momentum
d) Pressure
Answer: c) Momentum
31. Which physical quantity has dimension [ML⁻¹T⁻²]?
a) Pressure
b) Energy
c) Force
d) Momentum
Answer: a) Pressure
32. Which has the same dimensions as impulse?
a) Momentum
b) Work
c) Power
d) Pressure
Answer: a) Momentum
33. Which of these has no units?
a) Angle (in radian)
b) Temperature
c) Time
d) Energy
Answer: a) Angle (in radian)
34. Which is the fundamental unit of temperature in SI?
a) Fahrenheit
b) Celsius
c) Kelvin
d) Joule
Answer: c) Kelvin
35. Which is not a unit of time?
a) Second
b) Minute
c) Hour
d) Joule
Answer: d) Joule
36. Which unit is used to measure astronomical distances?
a) Light year
b) Kilometer
c) Newton
d) Joule
Answer: a) Light year
37. Which quantity is measured in parsec?
a) Distance
b) Energy
c) Time
d) Force
Answer: a) Distance
38. Which unit is not used for measuring length?
a) Fermi
b) Angstrom
c) Joule
d) Light year
Answer: c) Joule
39. Which is the SI unit of solid angle?
a) Radian
b) Steradian
c) Degree
d) None of these
Answer: b) Steradian
40. Which is the SI unit of plane angle?
a) Radian
b) Steradian
c) Degree
d) Joule
Answer: a) Radian
41. Which is the dimension of universal gravitational constant G?
a) [M⁻¹L³T⁻²]
b) [ML²T⁻²]
c) [ML⁻¹T⁻²]
d) [M⁰L³T⁻²]
Answer: a) [M⁻¹L³T⁻²]
42. Which of these has no dimension?
a) Relative density
b) Force
c) Power
d) Work
Answer: a) Relative density
43. Which of these is not a unit of energy?
a) Erg
b) Calorie
c) Joule
d) Dyne
Answer: d) Dyne
44. What is the SI unit of Planck’s constant (h)?
a) Js
b) J/s
c) N/m
d) Wb
Answer: a) Js
45. Which unit is used to measure intensity of sound?
a) Decibel
b) Joule
c) Watt
d) Pascal
Answer: a) Decibel
46. Which unit is used for measuring luminous flux?
a) Lumen
b) Candela
c) Lux
d) Watt
Answer: a) Lumen
47. Which quantity has the dimension [ML²T⁻³]?
a) Power
b) Work
c) Pressure
d) Energy
Answer: a) Power
48. Which has the dimension [ML²T⁻²]?
a) Work/Energy
b) Pressure
c) Velocity
d) Impulse
Answer: a) Work/Energy
49. Which has the unit "Nm⁻²"?
a) Pressure
b) Work
c) Torque
d) Energy
Answer: a) Pressure
50. The dimensional formula of surface tension is
a) [MT⁻²]
b) [ML²T⁻²]
c) [ML⁰T⁻²]
d) [MT⁻¹]
Answer: a) [MT⁻²]
51. Which of the following is not a SI derived unit?
a) Joule
b) Newton
c) Coulomb
d) Erg
Answer: d) Erg
52. One angstrom is equal to
a) 10⁻¹⁰ m
b) 10⁻⁹ m
c) 10⁻⁸ m
d) 10⁻¹² m
Answer: a) 10⁻¹⁰ m
53. 1 fermi = ?
a) 10⁻¹⁵ m
b) 10⁻¹⁴ m
c) 10⁻¹⁰ m
d) 10⁻⁹ m
Answer: a) 10⁻¹⁵ m
54. The SI unit of magnetic flux is
a) Weber
b) Tesla
c) Ampere
d) Henry
Answer: a) Weber
55. Which method is used to express errors in measurement?
a) Absolute error
b) Relative error
c) Percentage error
d) All of these
Answer: d) All of these
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Force = Mass × Acceleration = [MLT⁻²].
Units give physical quantities a standard reference, making measurements clear and comparable across the world.
They are digits in a number that carry meaningful information about its precision, including all certain digits and the first uncertain digit.
There are 7 fundamental quantities: length, mass, time, electric current, temperature, amount of substance, and luminous intensity.
Quantities that are expressed in terms of fundamental quantities (e.g., velocity, force, energy, pressure) are called derived quantities.
It introduces fundamental and derived physical quantities, SI units, dimensional analysis, and measurement of physical quantities with errors.
No. Dimensional analysis cannot give numerical constants like ½, 2, π, etc.