WBBSE For Class 9 Physical Science And Environment Chapter 1 Measurement MCQS

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Chapter 1 Measurement MCQs

Question 1. What is the SI unit of temperature?

  1. Calorie
  2. Kelvin
  3. Centigrade
  4. None of the above

Answer: (2) Kelvin

Question 2. Which unit should be chosen to measure the distance between two stars?

  1. Kilometre
  2. Femtometre
  3.  Lightyear
  4. None of the above

Answer: (3) Lightyear

Read And Learn More WBBSE Solutions For Class 9 Physical Science And Environment MCQS

Question 3. Which physical quantity has the dimension \(\left[\mathrm{LT}^{-2}\right]\)

  1. Velocity
  2. Acceleration
  3. Temperature
  4. None of the above

Answer: (2) Acceleration

WBBSE For Class 9 Physical Science And Environment Chapter 1 Measurement MCQS

WBBSE Class 9 measurement MCQs with answers

Question 4. What is the unit of atomic weight?

  1. Gram
  2. Milligram
  3. No unit
  4. None of the above

Answer: (3) No unit.

Question 5. At what temperature density of water is maximum?

  1.  0°C
  2. 4°C
  3. 1K
  4. None of the above

Answer: (2) 4°C.

Measurement chapter multiple choice questions for WBBSE Class 9

Question 6. Of the following quantities, which is a scalar quantity?

  1. Velocity
  2. Time
  3. Weight
  4. Force

Answer: (2) Time.

Question 7. The dimension of velocity is

  1. \(\left[\mathrm{LT}^{-1}\right]\)
  2. \(\left[\mathrm{LT}^{-2}\right]\)
  3. \(\left[\mathrm{ML}^{-1} \mathrm{~L}^{-2}\right]\)
  4. \(\left[\mathrm{MLT}^{-1}\right]\)

Answer: (1) \(\left[\mathrm{LT}^{-1}\right]\)

Question 8. Which one is not a fundamental unit?

  1. Metre
  2. Litre
  3. Kilogram
  4. Second

Answer: (2) Litre.

Question 9. A light year is a unit of

  1. Time
  2. Distance
  3. Temperature
  4. None of the above

Answer: (2) Distance.

Important measurement questions for Class 9 Physical Science

Question 10. To measure the diameter of an atom, the unit used is 

  1. Ohm 5
  2. Metre
  3. Fermi
  4. Millilitre

Answer: (3) Fermi

Question 11. 1 fermi is

  1. \(10^{-15}\) meter
  2. \(10^{-10}\) meter
  3. \(10^{-5}\) meter
  4. None of the above

Answer: (1) \(10^{-15}\)meter

Question 12. 1 X-unit is

  1. \(10^{-13}\)em
  2. \(10^{-12} \)em
  3. \(10^{-11}\)em
  4. None of the above

Answer: (3) \(10^{-11}\)em

WBBSE Class 9 Physical Science MCQs on units and measurements

Question 13. 1 light year is equal to

  1. 9.45 x \(10^{10}\) km
  2. 9.47 x \(10^{11}\)km
  3. 9.467 x \(10^{12}\)km
  4. None of the above

Answer: (3) 9.467 x\(10^{12}\)  km.

Question 14. Which one is a scalar quantity?

  1. Acceleration
  2. Velocity
  3. Work
  4. None of the above

Answer: (3) Work.

Question 15. An object has a density of 4 g/c.c. and a volume 20 c.c. What will be the mass of the object?

  1. 80g
  2. 40g
  3. 5g
  4. None ofthe above

Answer: (1) 80g

Question 16. Identify the vector quantity

  1. Mass
  2. Volume
  3. Time
  4. Weight

Answer: (4) Weight.

Question 17. The unit of volume is a

  1. Fundamental unit
  2. Derived unit
  3. None of these
  4. None of the above

Answer: (2) Derived unit.

Solved MCQs on measurement for WBBSE Class 9

Question 18. The density of Hg is

  1. 13.6 g/c.c.
  2. 12.6 g/c.c.
  3. 11.6 g/c.c.
  4. None of the above

Answer: (1) 13.6 g/c.c.

Question 19. The watch used in running competitions is 

  1. Pendulum clock
  2. Stop watch
  3. Table clock
  4. One of the above

Answer: (2) Stop watch.

Question 20. The dimension of Retardation is

  1. \( \left[\mathrm{LT}^{-1}\right]\)
  2. \( \left[\mathrm{LT}^{-2}\right]\)
  3. \( \left[\mathrm{LT}^{}\right]\)
  4. None of the above

Answer: (2)\( \left[\mathrm{LT}^{-2}\right]\)

Question 21. 1 parsec is

  1. 30:84 km
  2. 29:75 km
  3. 28:82 km
  4. None of the above

Answer: (1) 30:84 km

Question 22. 1 Astronomical Unit (AU) is

  1. 1.495 x\( 10^8 \)km
  2. 2:57 km
  3. 3:82 km
  4. None of the above

Answer: (4) 1.495 x\( 10^8 \) km.

Question 23. The dimension\(\left[\mathrm{MLT}^{-2}\right]\) corresponds to

  1. Pressure
  2. Momentum
  3. Force
  4. Energy

Answer: (4) Force

Question 24. SI unit of mass is

  1. Gram
  2. Kg
  3. Quintal
  4. Ton

Answer: (2) Kg

SI units and conversion MCQs Class 9 WBBSE

Question 25. SI unit of weight is

  1. Kg
  2. Dyne
  3. Newton
  4. Metre

Answer: (3) Newton

Question 26. Select the fundamental unit

  1. Litre
  2. Newt
  3. Ampere
  4. Coulomb

Answer: (3) Ampere

Question 27. The periodic time of a simple pendulum is proportional to the

  1. Its length
  2. Square root of its length
  3. Reciprocal of its length
  4. Square of its length

Answer: (2) Square root of its length

Question 28. The number of basic units in SI system is 

  1. 7
  2. 6
  3. 5
  4. 4

Answer: (1) 7

Question 29. The prefix mega stands for

  1. \(10^9\)
  2. \(10^8\)
  3. \( 10^7\)
  4. \(10^6\)

Answer: (4)\( 10^6\)

Best multiple choice questions on measurement for WBBSE Class 9

Question 30. One liter stands for

  1. \(10^3 \mathrm{~m}^3\)
  2. \(10^{-3} \mathrm{~m}^3\)
  3. \(10^3 \mathrm{~m}^3\)
  4.  \(10^3 \mathrm{~m}^3\)

Answer: (2) \(10^{-3} \mathrm{~m}^3\)

31. The dimension of force is

  1. \(\left[\mathrm{M^2LT}^2\right]\)
  2. \(\left[\mathrm{ML}^{-2} \mathrm{~T}^{-2}\right]\)
  3. \(\left[\mathrm{MLT}^2\right] \)
  4. \(\left[\mathrm{MLT}^{-2}\right] \)

Answer: (4)\(\left[ [\mathrm{MLT}^{-2}\right] \)

Question 32. Density is equal to Mass Volume

  1. Mass/Volume
  2. Volume/Mass
  3. Volume x Mass
  4. None of these

Answer: (1) Mass/Volume

Question 33. Newton is a

  1. Fundamental unit
  2. Derived unit
  3. Number
  4. None of these

Answer: (2) Derived unit

Question 34. \(10^{-6}\)m stands for

  1. Nanometer
  2. Mitron
  3. Femtometer
  4. Picometer

Answer: (2) Micron

Question 35. Light year indicates

  1. Time
  2. Distance
  3. A phenomenon of light energy
  4. None of the above

Answer: (2) Distance

Question 36. The unit used to measure the wavelength of visible light is usually

  1. \(10^{-15}\)m
  2. \(10^{-7}\)m
  3. \(10^{-9}\)m
  4. \(10^{-12}\)m

Answer: (3) \(10^{-9}\)m

Question 37. X-ray unit is

  1. \(10^{-3}\)m
  2. \(10^{-13}\)m
  3. \(10^{-6}\)m(4) \(10^{-4}\)m

Answer: (2) \(10^{-13}\)m

Question 38. Atomic mass unit is used to express

  1. Absolute molecular mass
  2. Relative mass compared to the mass of hydrogen
  3. Comparison between the masses of carbon and oxygen
  4. None of the above

Answer: (1) Absolute molecular mass

Question 39. Dimension of plane angle is

  1. Radian
  2. Zero
  3. Steradian
  4. \(L^{-1}\)

Answer: (1) Zero

Question 40. The unit used to measure the distance between two planets is

  1. Kilometer
  2. Gigameter
  3. \(10^{15}\)m
  4. Lightyear

Answer: (1) Light year

WBBSE Class 9 Physical Science errors and accuracy MCQs

Question 41. Candela is a

  1. Source of artificial light
  2. Unit of solid angle
  3. Unit of luminous intensity
  4. None of the these

Answer: (3) Unit of luminous intensity

Question 42. A physical quantity having magnitude but no dimension is

  1. A point
  2. Mechanical advantage
  3. Mole
  4. Ampere

Answer: (2) Mechanical advantage

Question 43. Dimension of frequency is

  1. \(\mathrm{LT}^{-1}\)
  2. \(\mathrm{T}^{-1}\)
  3. \( \mathrm{ML}^{-3}\)
  4. \(\mathrm{MLT}^2\)

Answer: (2) \(\mathrm{T}^{-1}\)

Question 44. If u = unit, n = magnitude, then the measure is

  1. n/u
  2. \(\mathrm{n}^2 u\)
  3. nu
  4. n+u

Answer: (3) nu

Question 45. Which one of the following is not a physical quantity?

  1. Mass
  2. Volume
  3. Pressure
  4. Length

Answer: (3) Pressure

Question 46. What is the dimensional formula of force?

  1. \(\left[\mathrm{M}^0{L} \mathrm{~T}^{-1}\right]\)
  2. \( \left[\mathrm{ML}\mathrm{~T}^{-2}\right]\)
  3. \(\left[\mathrm{ML}^2 \mathrm{~T}^{-2}\right]\)
  4. \(\left[\mathrm{ML}^{-1} \mathrm{~T}^{-2}\right]\)
  5. Answer: (2) \( \left[\mathrm{ML}\mathrm{~T}^{-2}\right]\)

Question 47. One astronomical (AU) is the average distance between

  1. The sun and moon
  2. The earth and the moon
  3. The earth and the sun
  4. None of these

Answer: (2) The earth and the sun

Question 48. What is the least count of a linear meter scale?

  1. 1cm
  2. 0.1 cm
  3. 0.01 cm
  4. 0.001 cm

Answer: (2) 0.1 cm

Question 49. 1 A is equal to

  1. \(10^{-6}\)m
  2. \(10^{-8}\)m
  3. \(10^{-10}\)m
  4. \(10^{8}\)m

Answer: (3)\(10^{-10}\)m

Question 50. Which one of the following is a fundamental/basic unit?

  1. Lightyear
  2. kg.m/s
  3. kg/m$
  4. Newton

Answer: (1) Lightyear

Question 51. Which one is a quantity with unit but without dimension?

  1. Pressure
  2. Velocity
  3. Solid angle
  4. Area

Answer: (3) Solid angle

Question 52. How many km are there in one light year?

  1. 9.46 x \(10^{15}\)
  2. 9.46 x \(10^{12}\)
  3. 9.46 x \(10^9\)
  4. 9.46 x \(10^6\)

Answer: (2) 9.46 x \(10^{12}\)

Question 53. Unit of temperature in SI system is

  1.  °K
  2.  K
  3. °F
  4. °C

Answer:  (2) K

 

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