Units and Measurements Class 11 Questions for Practices [LEVEL 1]

The first chapter of Class 11 Physics, "Units and Measurements," lays the foundation for understanding concepts that will be used throughout the course. It is essential to study this chapter thoroughly to grasp the fundamental principles that apply to all other chapters.

Study Tips:

1. Read the NCERT Textbook: Start by carefully reading the theory from the NCERT textbook. Pay attention to the definitions, formulas, and examples provided.

2. Practice NCERT Exercises: Try to solve all the exercises at the end of the chapter. If you need help, you can refer to the NCERT solutions for Class 11 Physics prepared by Merit Yard.

3. Utilize Additional Resources: Check out chapter-wise Physics questions curated by Merit Yard to test your understanding and improve your problem-solving skills.

4. Expert Guidance: Follow the NCERT Solutions for Class 11 Physics created by the expert faculty at Merit Yard to clarify any doubts.

5. Revision Notes: Access concise and comprehensive Class 11 Physics notes to reinforce your learning and prepare for exams effectively.



NEET Level Questions

LEVEL 1 TYPE QUESTIONS



  1. 1. The number of base units for measuring physical quantities according to the SI system are
  2. a) 1
    b) 10
    c) 7
    d) 8


  3. 2. Which of the following is not the name of physical quantity?
  4. a) Kilogram
    b) Density
    c) Impulse
    d) Energy


  5. 3. Light year is the unit of :
  6. a) Distance
    b) Time
    c) Speed
    d) Intensity of light


  7. 4. A dimensionless quantity
  8. a) Never has a unit
    b) always has a unit


     

    c) may have a unit
    d) does not exist


  9. 5. The unit of Luminous intensity is:
  10. a) Candela
    b) Watt
    c) Mole
    d) Ampere


  11. 6. Which of the following is not one of the fundamental quantities?
  12. a) Length
    b) Time
    c) Weight
    d) Mass


  13. 7. Which of the following ratios express pressure?
  14. a) Force/ area
    b) Energy/ Volume
    c) Energy/ area
    d) Force/ Volume


  15. 8. Which of the following is the unit of work?
  16. a) N sec
    b) N m
    c) N m -1
    d) N m2


  17. 9. Which of the following physical quantity has the dimensional formula [M1L2T-3]
  18. a)force
    b) power
    c) work
    d) impulse


  19. 10. The dimensions of kinetic energy is
  20. a) [M2L2T]
    b) [ML2T]
    c) [ML2T-2]
    d) [ML2T-1]


  21. 11. The number of significant figures in the number 0.0028 is
  22. a) 2
    b) 3
    c) 4
    d) 5


  23. 12. The number of significant figures in the number2.64×1024 kg is
  24. a) 3
    b) 4
    c) 27
    d) 2


  25. 13. Which of the following is dimensionless
  26. a) force/acceleration
    b) velocity/acceleration
    c) volume/area
    d) energy/work


  27. 14. 4.32×2.0 is equal to
  28. a) 8.64
    b) 8.6
    c) 8.60
    d) 8.640


  29. 15. Which of the following numerical values has three significant figures?
  30. a) 5.055
    b) 0.050
    c) 50.50
    d) 0.500


  31. 16. The zero error belongs to the category of:
  32. a) constant error
    b) personal error
    c) accidental error
    d) Instrumental errors


  33. 17. Choose the incorrect statement(s):
  34. a) A dimensionally correct equation may be correct.
    b) A dimensionally correct equation may be incorrect.
    c) A dimensionally incorrect equation may be correct.
    d) A dimensionally incorrect equation may be incorrect.


  35. 18. Which of the following have the same dimensions as v2/r Where v is the speed of the particle describing a circular path of radius r.
  36. a) Force
    b) Impulse
    c) Acceleration
    d) Momentum


  37. 19. One light year is defined as the distance travelled by light in one year. The speed of light is 3 x 108 m/s. The same in metre is:
  38. a) 3 x 1012 m
    b) 9.461 x 1015 m
    c) 3 x 1015 m
    d) None of these


  39. 20. The surface tension is T=F/l , then the dimensions of surface tension are:
  40. a) [MLT-2]
    b) [MT-2]
    c) [M0L0T0]
    d) None of these


  41. 21. Which of the following quantities has its unit is Newton second?
  42. a) Energy
    b) Torque
    c) Momentum
    d) Power


  43. 22. Taking into account of the significant figures, what is the value of 9.99 m - 0.00999 m? 2
  44. a) 9.9801 m
    b) 9.98 m
    c) 9.980 m
    d) 9.9 m


  45. 23. The height of a man is 5.87532 ft. But measurement is correct upto three significant figures. The correct height is :
  46. a) 5.86 ft
    b) 5.87 ft
    c) 5.88 ft
    d) 5.80 ft


  47. 24. If x=at+bt2,where x is the distance travelled by the body in kilometres while t is the time in seconds, then the units of b is
  48. a) Km/s
    b)Kms
    c) Km/s2
    d) Kms2


  49. 25. Which of the following sets cannot enter into the list of fundamental quantities in any system of unit ?
  50. a) length, mass and velocity
    b) length, time and velocity
    c) mass, time and velocity
    d) length, time and mass


  51. 26. A unitless quantity
  52. a) never has a non zero dimension
    b) always has a non zero dimension
    c) may have a non zero dimension
    d) does not exist


  53. 27. Which of the following pairs have the same dimensions ?
  54. a)Torque and work
    b) Angular momentum and Planck's constant
    c) Energy and Young's modulus
    d) Frequency and wavelength


  55. 28. Which of the following pairs have same dimensions?
  56. a) Frequency and angular velocity
    b) Tension and surface tension
    c) Density and energy density
    d) Linear momentum and angular momentum


  57. 29. The power of lens is P=1/f where f is focal length of the lens. The dimensions of power of lens are:
  58. a) [LT-2]
    b) [M0L-1T0]
    c) [M0L0T0]
    d) Instrumental errors


  59. 30. Plane angle and solid angle have: [NEET 2022]
  60. a) Units but no dimensions
    b) Dimensions but no units
    c) No units and no dimensions
    d) Both units and dimensions


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