In This Post we are providing Chapter-2 Units and Measurement NCERT MCQ for Class 11 Physics which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.
NCERT MCQ ON UNITS AND MEASUREMENT
Question 1 : One second is defined to be equal to
- a) 9192631770 periods of the cesium clock
- b) 1650763.73 periods of the cesium clock
- c) 652189.63 periods of the krypton clock
- d) 1650763.73 periods of the krypton clock
Answer : 9192631770 periods of the cesium clock
Question 2 : One yard in SI unit is equal to
- a) 0.9144 metre
- b) 1.0936 kilometre
- c) 1.9144 metre
- d) 0.09144 kilometre
Answer : 0.9144 metre
Question 3 : One pico farad is equal to
- a) 10–12 farad
- b) 10–24 farad
- c) 10–18 farad
- d) 10–6 farad
Answer : 10–12 farad
Question 4 : ‘Torr’ is the unit of
- a) pressure
- b) volume
- c) density
- d) flux
Answer : pressure
Question 5 : Very large distances such as the distance of a Planet or a star from Earth can be measured by
- a) Parallax method
- b) All of these
- c) Millikan’s oil drop method
- d) Spectrograph
Answer : Parallax method
Question 6 : Joule second is a unit of
- a) angular momentum
- b) torque
- c) energy
- d) power
Answer : angular momentum
Question 7 : Temperature can be expressed as derived quantity in terms of
- a) None of these
- b) mass and time
- c) length and mass
- d) length, mass and time
Answer : None of these
Question 8 : Unit of specific resistance is
- a) ohm – m
- b) ohm/m
- c) ohm m3
- d) ohm/m2
Answer : ohm – m
Question 9 : Unit of magnetic moment is
- a) ampere–metre2
- b) weber–metre2
- c) ampere–metre
- d) weber/metre
Answer : ampere–metre2
Question 10 : Dimensional analysis can be applied to
- a) All of these
- b) to convert from one system of units to another
- c) deduce relations among the physical quantities
- d) check the dimensional consistency of equations
Answer : All of these
Question 11 : The dimensions of pressure is equal to
- a) energy per unit volume
- b) energy
- c) force
- d) force per unit volume
Answer : energy per unit volume
Question 12 : Which is dimensionless?
- a) Force/acceleration
- b) Velocity/acceleration
- c) Energy/work
- d) Volume/area
Answer : Force/acceleration
Question 13 : The dimensions of torque are
- a)
- b)
- c)
- d)
Answer :
Question 14 : The division of energy by time is X. The dimensional formula of X is same as that of
- a) power
- b) electric field
- c) momentum
- d) torque
Answer : power
Question 15 : Which of the following is a dimensional constant?
- a) Gravitational constant
- b) Dielectric constant
- c) Refractive index
- d) Relative density
Answer : Gravitational constant
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