 MCQ Questions for Class 11 Physics Chapter 2 Units and Measurements with Answers

# MCQ Questions for Class 11 Physics Chapter 2 Units and Measurements with Answers

Check the below NCERT MCQ Questions for Class 11 Physics Chapter 2 Units and Measurements with Answers Pdf free download. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. We have provided Units and Measurements Class 11 Physics MCQs Questions with Answers to help students understand the concept very well.

## Q1. Out of the following pairs, which one does not have identical dimensions ?

(a) Angular momentum and Planck’s constant
(b) Impulse and momentum
(c) Moment of inertia and moment of a force
(d) Work and torque

(c) Moment of inertia and moment of a force

(a) Energy
(b) Watt hour
(c) Momentum
(d) Work

(c) Momentum

## Q3. Identify the pair whose dimensions are equal.

(a) Torque and work
(b) Stress and energy
(c) Force and stress
(d) Force and work

(a) Torque and work

## Q4. Dimensions cannot be used to

(a) check dimensional correctness of a formula
(b) convert units
(c) find value of the constant of proportionality in an equation
(d) deduce a relation among physical quantities

(c) find value of the constant of proportionality in an equation

## Q5. Two physical quantities whose dimensions are not same, cannot be :

(a) multiplied with each other
(b) divided
(c) added or substracted in the same expression

(c) added or substracted in the same expression

(a) e2 – e2
(b) e2 + 2e2
(c) e2 + e2
(d) e2 – 2e2

(b) e2 + 2e2

(a) thirty
(b) five
(c) four
(d) three

(b) five

## Q8. The most suitable instrument for measuring the size of an atom is.

(a) Electron microscope
(b) Vernier calliper
(c) Optical Microscope
(d) Screw gauge

(a) Electron microscope

(a) 1 %
(b) 2 %
(c) 4 %
(d) No error

(c) 4 %

(a) 5, 1, 2
(b) 4, 4, 2
(c) 5, 1, 5
(d) 5, 5, 2

(a) 5, 1, 2

## Q11. Choose the correct statement(s)

(a) Topological sort can be used to obtain an evaluation order of a depending graph.
(b) Evaluation order for a dependency graph dicates the order in which the semantic rules are done
(c) Code generation is independent of the order in which the semantic actions are performed
(d) Both (a) and (b)

(d) Both (a) and (b)

(a) 6
(b) 2
(c) 4
(d) 3

(d) 3

## Q13. Which of the following is not the unit of energy?

(a) watt-hour
(b) electron-volt
(c) N × m
(d) kg × m/sec2

(d) kg × m/sec2

(a) One minute
(b) Half minute
(c) One degree
(d) Half degree

(a) One minute

## Q15. Electron volt is a unit of

(a) Potential difference
(b) Electric current
(c) Electronic charge
(d) Energy

(d) Energy

(a) 300
(b) 450
(c) 600
(d) 0

(c) 600

## Q17. Resolution is

(a) a measure of the bias in the instrument
(b) None of these
(c) the smallest amount of input signal change that the instrument can detect reliably
(d) a measure of the systematic errors

(d) a measure of the systematic errors

## Q18. Absolute error of the measurement is

(a) the difference between the individual measurement and the true value of the quantity cubed.
(b) the difference between the individual measurement and the true value of the quantity squared.
(c) the difference between two individual measurements and their mean
(d) the difference between the individual measurement and the true value of the quantity

(a) the difference between the individual measurement and the true value of the quantity cubed.

(a) Wb/m²
(b) Henry(H)
(c) H/m²
(d) Weber(Wb)

(b) Henry(H)

## Q20. Light year is a unit of

(a) time
(b) distance
(c) sunlight intensity
(d) mass

(b) distance

## Q21. 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

(a) Magnetic flux – weber

## Q22. 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

(a) 9192631770 periods of the cesium clock