Units And Measurements (Class 11) MCQs and Answers plays an important role in determining that how much step you take to clear the NEET (National Eligibility Entrance Test), AIIMS (All India Institute of Medical Sciences) and JEE (Joint Entrance Examination) which are conducted by the National Testing Agency (NTA). Multiple Choice Questions On Units And Measurements PDF With Answers is very important step for you when you are choosing the right book to prepare the NEET exam.

## Class 11 Physics Units And Measurements MCQ

These Units And Measurements (Class 11) MCQs and Answers are based on the following topics:

### Class 11 Physics Units And Measurements MCQ

**1. What is the standard unit of measurement of Force?**

a) Newton

b) Joule

c) Meter

d) Newton-meter

**Answer: **a

**2. 89 Mega Joules can also be expressed as _____**

a) 8900 Joules

b) 89000000 Joules

c) 89000 Joules

d) 890000 Joules

**Answer: **b

**3. Convert 5 N to Dynes.**

a) 500000 Dynes

b) 500 Dynes

c) 5 Dynes

d) 0.5 Dynes

**Answer: **a

**4. Which of the following is not a system of units?**

a) MKS

b) CGS

c) SI

d) Decibel

**Answer: **d

**5. What does a Voltmeter measure?**

a) Voltage

b) Current

c) Length

d) Speed

**Answer: **a

**6. What is the unit of measurement of solid angles?**

a) Steradians

b) Degrees

c) Radians

d) Grades

**Answer: **a

**7. Which of the following system matches with the SI unit system?**

a) FPS

b) MKS

c) CGS

d) American system

**Answer: **b

**8. Which of the following is a unit of temperature?**

a) Degree

b) Meter

c) Second

d) Fahrenheit

**Answer: **d

**9. The number of base units for measuring physical quantities according to the SI system are ____**

a) 1

b) 10

c) 7

d) 8

**Answer: **c

**10. What is the unit for measuring intensity of light?**

a) Candela

b) Lightyear

c) Meter

d) Mol

**Answer: **a

**11. What is the full form of SI?**

a) Standard International

b) System International

c) Scientific International

d) Science International

**Answer: **b

**12. Mass can be measured using _____**

a) Beam balance

b) Clock

c) Our hands

d) Water

**Answer: **a

**13. Mass is a _____**

a) Scalar quantity

b) Vector quantity

c) Free quantity

d) Dependent quantity

**Answer: **a

**14. Weight represents ___**

a) Mass

b) Time

c) Pressure

d) Force

**Answer: **d

**15. Which one of the following units can be used to measure matter?**

a) Kilogram

b) Newton

c) Second

d) Mile

**Answer: **a

**16. Which of the following is the standard unit of measurement of mass?**

a) Gram

b) Kilogram

c) Pound

d) Dozen

**Answer: **b

**17. Which of the following is the correct relation?**

a) 1 Kg = 100 g

b) 1 Kg = 1 g

c) 1 g = 0.001 Kg

d) 1 g = 0.01 Kg

**Answer: **c

**18. Mass can be explained as _____**

a) Amount of space

b) Amount of time

c) Amount of weight

d) Amount of matter

**Answer: **d

**19. Distance between two cities, in standard units will be measured in ______**

a) Meter

b) Kilometer

c) Mile

d) Centimeter

**Answer: **a

**20. Which of the following devices cannot measure distance?**

a) Vernier Calipers

b) Micrometer

c) Ruler

d) Protractor

**Answer: **d

**21. How many inches are there in 1 yard?**

a) 12

b) 36

c) 6

d) 18

**Answer: **b

**22. How many kilometers make one mile?**

a) 1

b) 2.5

c) 0.5

d) 1.6

**Answer: **d

**23. How many kilometers make one nautical mile?**

a) 1

b) 1.536

c) 1.852

d) 1.756

**Answer: **c

**24. Usually, what is the least count of a screw gauge?**

a) 0.01 cm

b) 0.001 cm

c) 0.1 cm

d) 1 mm

**Answer: **b

**25. ****How many ****kilometers make one light year?**

a) 9.4607 × 10^{12} km

b) 9.4607 × 10^{9} km

c) 9.4607 × 10^{11} km

d) 9.4607 × 10^{10} km

**Answer: **d

**26. Interplanetary distances are measured in ____**

a) Light year

b) Kilometer

c) Megameter

d) Watt

**Answer: **a

**27. Which of the following are NOT units of time?**

a) Second

b) Light year

c) Tropical year

d) Minute

**Answer: **b

**28. Which of the following unit is related to sound frequency?**

a) Hertz

b) Decibel

c) Second

d) Meter

**Answer: **a

**29. How many milliseconds make one second?**

a) 10

b) 60

c) 45

d) 80

**Answer: **a

**30. How many decades are there in 1 century?**

a) 10

b) 20

c) 4

d) 5

**Answer: **a

**31. How many years are there in one millennium?**

a) 1000

b) 100

c) 10

d) 70

**Answer: **a

**32. Which of the following gives the most accurate result for time measurement?**

a) Wall clock

b) Digital watch

c) Quartz clock

d) Atomic clock

**Answer: **d

**33. Which of the following is equivalent to one hour?**

a) 36000 milliseconds

b) 3600 milliseconds

c) 3600000 milliseconds

d) 360000 milliseconds

**Answer: **a

**34. In 5 experiments with the same objective, the values obtained are very near to each other. These values can be called ____**

a) Precise

b) Accurate

c) Average

d) Invalid

**Answer: **a

**35. Range of an instrument is _____**

a) The minimum value that can be measured

b) The maximum value that can be measured

c) All values starting from the minimum to the maximum that can be measured

d) The average of all values that can be measured

**Answer: **c

**36. Usually how many types of errors are present in scientific measurements?**

a) 2

b) 3

c) 4

d) 5

**Answer: **b

**37. What is least count of an instrument?**

a) The lowest value that can be measured accurately

b) The greatest value that can be measured accurately

c) Half of the lowest value that can be measured accurately

d) Mean of the lowest and highest values

**Answer: **a

**38. In an experiment, it is found that the experimental value is very close to actual value, hence the experimental value can be called _____**

a) Accurate

b) Precise

c) Suitable

d) Mean

**Answer: **a

**39. What is the reason for the occurrence of systematic errors in an instrument ?**

a) No use for a long time

b) High use

c) Manufacturing fault

d) Delivery fault

**Answer: **b

**40. How are systematic errors removed usually for an instrument?**

a) By replacing it

b) By re-calibrating it

c) By using a repairing service

d) By not using it for some time

**Answer: **b

**41. The length and breadth of a rectangle are 4.5 mm and 5.9 mm. Keeping the number of significant figures in mind, its area in mm2 is ____**

a) 22.55

b) 26.55

c) 26.6

d) 22

**Answer: **b

**42. The number of significant digits in 1559.00 is ____**

a) 6

b) 5

c) 3

d) 4

**Answer: **a

**43. The number 0.005900, in standard scientific ****form can be expressed as ______**

a) 5.9×10^{3}

b) 59×10^{4}

c) 5.9×10^{2}

d) 5.9×10^{4}

**Answer: **a

**44. Number of significant digits in 0.0028900 is ______**

a) 5

b) 6

c) 7

d) 8

**Answer: **a

**45. What is the number 75.66852 rounded off to 5 significant digits?**

a) 75.67

b) 75.669

c) 75.668

d) 75.667

**Answer: **b

**46. The length of a cube is 2.3 cm. What is its volume rounded off to 4 significant digits in cm3?**

a) 12.67

b) 12.167

c) 12.17

d) 13

**Answer: **c

**47. How many significant digits are there in 25.33600?**

a) 7

b) 8

c) 5

d) 6

**Answer: **a

**48. The number of significant digits in 5.002 is ____**

a) 5

b) 4

c) 3

d) 6

**Answer: **b

**49. The volume of a box, 10 m wide, 4.5m, long and 2.3 m high up to 3 significant digits in m3 is ____**

a) 104

b) 103.5

c) 103

d) 100

**Answer: **a

**50. How many significant digits are there in 002.5001?**

a) 1

b) 5

c) 7

d) 6

**Answer: **b

**51. ****[MLT**^{-2}**] matches with ****the dimensional formula of ___**

^{-2}

a) Force

b) Modulus of elasticity

c) Displacement

d) Strain

**Answer: **a

**52. What is the maximum number of unknowns that can be found through a simple dimensional equation?**

a) 6

b) 5

c) 3

d) 2

**Answer: **c

**53. ****If, v stands for velocity, L for length, T for time and M for mass, what is t****he value of x in the equation –**

L = (vT/M)^{x}?

a) 3

b) 2

c) 1

d) 0

**Answer: **d

**54. ****Assuming standard notations, which of the followi****ng quantities is dimensionless?**

a) v/a

b) P/Fv

c) FE/L

d) V^{2}/g

**Answer: **b

**55. If the units of length and time are doubled, what will be the factor by which the unit of acceleration will change?**

a) 1

b) 0.25

c) 0.5

d) 2

**Answer: **c

**56****. What are ****the dimensions of a light year?**

a) L

b) T

c) LT^{-1}

d) M

**Answer: **a

**57****. What are the dimensi****ons of coefficient of friction?**

a) MLT^{-2}

b) LT^{-1}

c) L

d) It is dimensionless

**Answer: **d

**58. Identify the primary quantity from the following.**

a) Mass

b) Density

c) Speed

d) Volume

**Answer: **a

**59. Which of the following is a use of dimensional analysis?**

a) To check the dimensional correctness of an equation

b) To solve the equation dimensionally

c) To get the number of dimensional constants

d) To understand the dimensional equation

**Answer: **a

**60. The dimension whose unit does not depend on any other dimension’s unit is known as ________**

a) Fundamental dimension

b) Dependent dimension

c) Independent dimension

d) Absolute dimension

**Answer: **a

#### Download PDF (MCQ On Units And Measurements)

### FAQs on Units And Measurements

**What are the 7 fundamental units?**

The seven SI base units are the most basic physical quantities in the SI. The base units are the foundation of the International System of Units (Si), which is known as the modern metric system. These are

1) Length – meter (m)

2) Time – second (s)

3) Amount of substance – mole (mole)

4) Electric current – ampere (A)

5) Temperature – kelvin (K)

6) Luminous intensity – candela (cd)

7) Mass – kilogram (kg)

**What is unit and measurement in physics?**

A unit is a physical quantity upon which a numerical value can be assigned. For example, mass and time are physical quantities but cannot be directly measured in the laboratory. However, they can be measured in terms of their units, such as kilograms and seconds. If we know how to measure either one of them in terms of its units, we will be able to find out the value of the other quantity if we know its unit.

**What are the important topics in units and Measurements Class 11?**

The most important topics in units and Measurements Class 11 are Length, Mass and Time Measurements, Instruments Accuracy and Precision, Significant Figures, Dimensional Formulae and Equations, Physical Quantities (dimensions), Dimensional Analysis and Applications.