Practice JEE Physics Units and Measurements MCQs Set A provided below. The MCQ Questions for Full Syllabus Units and Measurements Physics with answers and follow the latest JEE (Main)/ NCERT and KVS patterns. Refer to more Chapter-wise MCQs for JEE (Main) Full Syllabus Physics and also download more latest study material for all subjects
MCQ for Full Syllabus Physics Units and Measurements
Full Syllabus Physics students should review the 50 questions and answers to strengthen understanding of core concepts in Units and Measurements
Units and Measurements MCQ Questions Full Syllabus Physics with Answers
Question: The base quantity among the following is
- a) Length
- b) Area
- c) Speed
Answer: Length
Question: Which of the following is not a unit of time?
- a) Light year
- b) Hour
- c) Minute
Answer: Light year
Question: One astronomical unit is a distance equal to
- a) 1.496 × 1011 m
- b) 9.46 × 1015 m
- c) 3 × 108 m
- d) None of this
Answer: 1.496 × 1011 m
Question: The volume of a cube having sides 1.2 m is appropriately expressed as
- a) 1.728 × 106 cm3
- b) 1.7 × 106 cm3
- c) 1.8 × 106 cm3
- d) All of these
Answer: 1.728 × 106 cm3
Question: Ampere second is a unit of
- a) Charge
- b) Current
- c) Energy
- d) Power
Answer: Charge
Question: The most precise reading of the mass of an object, among the following is
- a) 20.01 g
- b) 20 × 100 g
- c) 20.0 g
- d) 20 g
Answer: 20.01 g
Question: The most accurate reading of the length of a 6.28 cm long fibre is
- a) 6.5 cm
- b) 6 cm
- c) 5.99 cm
- d) 6.0 cm
Answer: 6.5 cm
Question: Which of the following is a unit that of force?
- a) mN
- b) N m
- c) nm
- d) N s
Answer: mN
Question: The value of 60° in radian is
- a)
- b)
- c)
- d) All of these
Answer:
Question: The total plane angle subtended by a circle at its centre is
- a)
- b)
- c)
- d)
Answer:
Question:
- a)
- b)
- c)
- d) All of these
Answer:
Question: One unified atomic mass unit represents a mass of magnitude
- a) 1.66 × 10–27kg
- b) 1030 kg
- c) 1.66 × 1027 kg
- d) 10–30 kg
Answer: 1.66 × 10–27kg
Question: If the average life of a person is taken as 100 s, the age of the universe on this scale is of the order
- a) 1010 s
- b) 108 s
- c) 1017 s
- d) 109 s
Answer: 1010 s
Question: Which of the following is the most precise measurement?
- a) 300 × 10–5 m
- b) 30 × 10–4 m
- c) 0.0030 m
- d) 3 × 10–3 m
Answer: 300 × 10–5 m
Question: The number of significant figures in a pure number 410 is
- a) Infinite
- b) One
- c) Three
- d) Two
Answer: Infinite
Question: Thickness of a pencil measured by using a screw gauge (least count .001 cm) comes out to be 0.802 cm. The percentage error in the measurement is
- a) 0.125%
- b) 2.43%
- c) 4.12%
- d) 2.14%
Answer: 0.125%
Question: The percentage error in the measurement of the voltage V is 3% and in the measurement of the current is 5%2%. The percentage error in the measurement of the resistance is
- a) 5%
- b) 1%
- c) 2%
- d) 3%
Answer: 5%
Question: The relative error in the measurement of the side of a cube is 0.027. The relative error in the measurement of its volume is
- a) 0.081
- b) 0.046
- c) 0.054
- d) 0.027
Answer: 0.081
Question: Zero error in an instrument introduces
- a) Systematic error
- b) Random error
- c) Least count error
- d) Personal error
Answer: Systematic error
Question: A packet contains silver powder of mass 20.23 g ± 0.01 g. Some of the powder of mass 5.75 g ± 0.01 g is taken out from it. The mass of the powder left back
- a) 14.48 ± 0.02 g
- b) 14.48 g ± 0.00 g
- c) 14.5 g ± 0.1 g
- d) 14.5 g ± 0.2 g
Answer: 14.48 ± 0.02 g
More Questions..............................
Question: The addition of three masses 1.6 g, 7.32 g and 4.238 g, addressed upto proper decimal places is
- a) 13.2 g
- b) 13.158 g
- c) 13.16 g
- d) 13.15 g
Answer: 13.2 g
Question: The area of a sheet of length 10.2 cm and width 6.8 cm addressed upto proper number of significant figures is
- a) 69 cm2
- b) 70 cm2
- c) 69.4 cm2
- d) 69.36 cm2
Answer: 69 cm2
Question: The radius of a sphere is (2.6 ± 0.1) cm. The percentage error in its volume is
- a)
- b)
- c)
- d) None of this
Answer:
Question: The uncertain digit in the measurement of a length reported as 41.68 cm is
- a) 8
- b) 6
- c) 1
- d) 4
Answer: 8
Question: We can reduce random errors by
- a) Taking large number of observations
- b) By following proper technique of experiment
- c) Corrected zero error
- d) Al of this
Answer: Taking large number of observations
Question: The number of significant figures in the measured value 0.0204 is
- a) Three
- b) Five
- c) Four
- d) Two
Answer: Three
Question: The number of significant figures in the measured value 26000 is
- a) Two
- b) Five
- c) Three
- d) Infinite
Answer: Two
Question: The number of significant zeroes present in the measured value 0.020040, is
- a) Three
- b) One
- c) Two
- d) Five
Answer: Three
Question: The number of significant figures in the measured value 4.700 m is the same as that in the value
- a) 470.0 m
- b) 4070 m
- c) 0.047 m
- d) 4700 m
Answer: 470.0 m
Question: If a calculated value 2.7465 g contains only three significant figures, the two insignificant digits in it are
- a) 6 and 5
- b) 4 and 6
- c) 7 and 4
- d) 2 and 7
Answer: 6 and 5
Question: An object of mass 4.237 g occupies a volume 1.72 cm3. The density of the object to appropriate significant figures is
- a) 2.46 g cm–3
- b) 2.463 g cm–3
- c) 2.5 g cm–3
- d) 2.50 g cm–3
Answer: 2.46 g cm–3
Question: Round off the value 2.845 to three significant figures
- a) 2.84
- b) 2.85
- c) 2.80
- d) 2.83
Answer: 2.84
Question: A length 5.997 m rounded off to three significant figures is written as
- a) 6.00 m
- b) 5.99 m
- c) 5.95 m
- d) 5.90 m
Answer: 6.00 m
Question: The order of the magnitude of speed of light in SI unit is
- a) 8
- b) 16
- c) 4
- d) 7
Answer: 8
Question: The values of a number of quantities are used in a mathematical formula. The quantity that should be most precise and accurate in measurement is the one
- a) Having smallest magnitude
- b) Used in the numerator
- c) Having largest magnitude
- d) Used in the denominator
Answer: Having smallest magnitude
Question: What are the dimensions of the change in velocity?
- a) [LT–1]
- b) [MLT–1]
- c) [LT–2]
- d) None of this
Answer: [LT–1]
Question: The dimensional formula for energy is
- a) [ML2T–2]
- b) [MLT–2]
- c) [M–1L2T]
- d) All of these
Answer: [ML2T–2]
Question: The pair of the quantities having same dimensions is
- a) Wavelength, focal length
- b) Displacement, velocity
- c) Time, frequency
- d) Force, acceleration
Answer: Wavelength, focal length
Question: The dimensional formula for relative refractive index is
- a) [M0L0T0]
- b) [M1L0T0]
- c) [M1L1 T1]
- d) [MLT–1]
Answer: [M0L0T0]
Question: The dimensional formula [ML–1T–2] is for the quantity
- a) Pressure
- b) Acceleration
- c) Force
- d) Work
Answer: Pressure
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Important Practice Resources for JEE Physics
MCQs for Units and Measurements Physics Full Syllabus
Students can use these MCQs for Units and Measurements to quickly test their knowledge of the chapter. These multiple-choice questions have been designed as per the latest syllabus for Full Syllabus Physics released by JEE (Main). Our expert teachers suggest that you should practice daily and solving these objective questions of Units and Measurements to understand the important concepts and better marks in your school tests.
Units and Measurements NCERT Based Objective Questions
Our expert teachers have designed these Physics MCQs based on the official NCERT book for Full Syllabus. We have identified all questions from the most important topics that are always asked in exams. After solving these, please compare your choices with our provided answers. For better understanding of Units and Measurements, you should also refer to our NCERT solutions for Full Syllabus Physics created by our team.
Online Practice and Revision for Units and Measurements Physics
To prepare for your exams you should also take the Full Syllabus Physics MCQ Test for this chapter on our website. This will help you improve your speed and accuracy and its also free for you. Regular revision of these Physics topics will make you an expert in all important chapters of your course.
You can get most exhaustive JEE Physics Units and Measurements MCQs Set A for free on StudiesToday.com. These MCQs for Full Syllabus Physics are updated for the 2025-26 academic session as per JEE (Main) examination standards.
Yes, our JEE Physics Units and Measurements MCQs Set A include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the JEE (Main) paper is now competency-based.
By solving our JEE Physics Units and Measurements MCQs Set A, Full Syllabus students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Physics.
Yes, Physics MCQs for Full Syllabus have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused JEE (Main) exams.
Yes, you can also access online interactive tests for JEE Physics Units and Measurements MCQs Set A on StudiesToday.com as they provide instant answers and score to help you track your progress in Physics.