# CBSE Class 11 Physics Units and Measurements MCQs

## Units and Measurements Class 11 Physics MCQ

Class 11 Physics students should refer to the following multiple-choice questions with answers for Units and Measurements in standard 11. These MCQ questions with answers for Grade 11 Physics will come in exams and help you to score good marks

### Units and Measurements MCQ Questions Class 11 Physics with Answers

#### Question :  Which one of the following pairs of quantities and their units is a proper match?

• a) Magnetic flux – weber
• b) Capacitance – henry
• c) Impulse – N/sec

Answer :  Magnetic flux – weber

#### Question :  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 :  One yard in SI unit is equal to

• a) 0.9144 metre
• b) 1.0936 kilometre
• c) 1.9144 metre
• d) 0.09144 kilometre

• a) pressure
• b) volume
• c) density
• d) flux

#### Question :  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

#### Question :  Joule second is a unit of

• a) angular momentum
• b) torque
• c) energy
• d) power

#### Question :  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

• a) ohm – m
• b) ohm/m
• c) ohm m3
• d) ohm/m2

#### Question :  Unit of magnetic moment is

• a) ampere–metre2
• b) weber–metre2
• c) ampere–metre
• d) weber/metre

#### Question :  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

#### Question :  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 :  Which is dimensionless?

• a) Force/acceleration
• b) Velocity/acceleration
• c) Energy/work
• d) Volume/area

• a)

• b)

• c)

• d)

#### Question :  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

#### Question :  Which of the following is a dimensional constant?

• a) Gravitational constant
• b) Dielectric constant
• c) Refractive index
• d) Relative density

#### Question :  The dimensions of mobility are

• a)

• b)

• c) Both
• d) None of these

#### Question :  The magnitude of the difference between the individual measurement and true value of the quantity is called

• a) absolute error
• b) relative error
• c) None of these
• d) percentage error

#### Question :  Systematic errors can be

• a) either positive or negative
• b) negative only
• c) positive only
• d) None of these

Answer :  either positive or negative

#### Question :  Random error can be eliminated by

• a) taking large number of observations and then their mean
• b) measuring the quantity with more than one instrument
• c) eliminating the cause
• d) careful observation

Answer :  taking large number of observations and then their mean

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