100 High-Scoring MCQs on Measurement (Set - 1) | Class 11 Physics | Unit-1 | FBISE

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Class 11 Physics – Unit-wise MCQs & Study Resources (Main-Page)

This post contains 100 carefully selected multiple-choice questions (MCQs) Set-1 from Unit-1: Physical Quantities and Measurement of Class 11 Physics, designed strictly according to the FBISE syllabus. These MCQs include a well-balanced mix of conceptual and numerical problems, making them exam-ready, revision-friendly, and high-scoring.

Whether you are preparing for annual board examinations, chapter tests, or competitive entry tests, this comprehensive MCQ collection thoroughly covers all the fundamental principles of measurement, uncertainty, and dimensional analysis, enabling students to master the chapter with confidence and accuracy.
This unit-wise MCQ set includes questions from:
Scope of Physics in science, technology, and society
SI base units, derived units, and supplementary units for various measurements
Derived units as products or quotients of base units
Conventions for indicating units as set out in SI units
Uncertainty in measurements, including systematic and random errors
Least count or resolution of measuring instruments
Precision and accuracy, including numerical and practical applications
Uncertainty in derived quantities using addition of fractional, actual, or percentage uncertainties
Correct use of scientific notation, significant figures, and units in all numerical and practical work
Dimensional homogeneity of physical equations and derivation of formulae using dimensions
Each MCQ is provided with the correct answer and a clear, concise explanation, helping students:
Strengthen conceptual understanding of measurements, errors, and dimensional analysis
Avoid common exam mistakes in numerical and conceptual questions
Improve problem-solving skills involving derived quantities, uncertainties, and unit conversions
Achieve maximum marks in the MCQs section
This all-in-one MCQ collection is an essential tool for all students aiming to excel in physics exams and fully master the concepts of Physical Quantities, Measurement, uncertainty, and dimensional analysis.

MCQs. no. 1

Physics is mainly concerned with the study of:

a. Living organisms
b. Matter and energy
c. Society and culture
d. Language

Correct answer: b. Matter and energy

Explanation:
Physics studies matter, energy, and their interactions.

MCQ 2

Which branch of physics deals with motion without considering its causes?

a. Dynamics
b. Kinematics
c. Thermodynamics
d. Optics

Correct answer: b. Kinematics

Explanation:
Kinematics describes motion without discussing forces.

MCQ 3

Which of the following is NOT a base quantity?

a. Length
b. Mass
c. Force
d. Time

Correct answer: c. Force

Explanation:
Force is a derived quantity, not a base quantity.

MCQ 4

The SI unit of luminous intensity is:

a. Lumen
b. Candela
c. Lux
d. Watt

Correct answer: b. Candela

Explanation:
Candela is the SI base unit of luminous intensity.

MCQ 5

Which of the following is a derived quantity?

a. Length
b. Time
c. Electric current
d. Pressure

Correct answer: d. Pressure

Explanation:
Pressure = Force/Area, derived from base quantities.

MCQ 6

The SI prefix “deci” represents:

a. 10⁻¹
b. 10⁻²
c. 10⁻³
d. 10⁻⁶

Correct answer: a. 10⁻¹

Explanation:
Deci = one-tenth = 10⁻¹.

MCQ 7

The SI prefix “tera” represents:

a. 10³
b. 10⁶
c. 10⁹
d. 10¹²

Correct answer: d. 10¹²

Explanation:
Tera means trillion = 10¹².

MCQ 8

Which of the following is a unit of energy?

a. Newton
b. Joule
c. Pascal
d. Tesla

Correct answer: b. Joule

Explanation:
Joule is the SI unit of energy.

MCQ 9

Which physical quantity is measured in coulomb?

a. Current
b. Voltage
c. Charge
d. Resistance

Correct answer: c. Charge

Explanation:
Coulomb is the SI unit of electric charge.

MCQ 10

The dimensional formula of force is:

a. [MLT⁻²]
b. [ML²T⁻¹]
c. [M⁻¹LT⁻²]
d. [LT⁻¹]

Correct answer: a. [MLT⁻²]

Explanation:
Force = mass × acceleration.

MCQ 11

Which of the following is NOT a physical quantity?

a. Mass
b. Length
c. Beauty
d. Time

Correct answer: c. Beauty

Explanation:
Beauty cannot be measured scientifically.

MCQ 12

The SI unit of work is:

a. Watt
b. Newton
c. Joule
d. Pascal

Correct answer: c. Joule

Explanation:
Work and energy share the same unit: Joule.

MCQ 13

Which quantity has the dimension [L²]?

a. Area
b. Volume
c. Velocity
d. Force

Correct answer: a. Area

Explanation:
Area = length × length = L².

MCQ 14

Which quantity has the dimension [L³]?

a. Area
b. Volume
c. Density
d. Pressure

Correct answer: b. Volume

Explanation:
Volume = length³.

MCQ 15

The SI unit of power is:

a. Joule
b. Watt
c. Newton
d. Volt

Correct answer: b. Watt

Explanation:
Power = work per second, unit is watt.

MCQ 16

The formula $s = ut + \frac{1}{2}at^2$ is dimensionally:

a. Correct
b. Incorrect; [L] ≠ [T]
c. Incorrect; [L²] ≠ [T²]
d. Cannot decide

Correct answer: a. Correct

Explanation:
[u t] = [L], [½ a t²] = [L] → LHS = RHS.

MCQ 17

The dimensional formula of acceleration is:

a. [LT⁻¹]
b. [LT⁻²]
c. [L²T⁻¹]
d. [M⁻¹LT⁻²]

Correct answer: b. [LT⁻²]

Explanation:
Acceleration = change in velocity per time.

MCQ 18

Which of the following is a supplementary unit?

a. Meter
b. Second
c. Radian
d. Kilogram

Correct answer: c. Radian

Explanation:
Radian is the supplementary unit of plane angle.

MCQ 19

The SI unit of temperature is:

a. Celsius
b. Fahrenheit
c. Kelvin
d. Joule

Correct answer: c. Kelvin

Explanation:
Kelvin is the SI base unit of temperature.

MCQ 20

The smallest measurable division on an instrument scale is called:

a. Error
b. Precision
c. Least count
d. Accuracy

Correct answer: c. Least count

Explanation:
Least count is the smallest increment measurable.

MCQ 21

Accuracy refers to:

a. Closeness to true value
b. Reproducibility
c. Least count
d. Instrument range

Correct answer: a. Closeness to true value

Explanation:
Accuracy means how close a measurement is to the actual value.

MCQ 22

Precision refers to:

a. True value
b. Repeated measurements consistency
c. Error correction
d. Calibration

Correct answer: b. Repeated measurements consistency

Explanation:
Precision means how consistent measurements are.

MCQ 23

A zero error is an example of:

a. Random error
b. Systematic error
c. Human error
d. Absolute error

Correct answer: b. Systematic error

Explanation:
Zero error occurs due to faulty calibration, so systematic.

MCQ 24

Which of the following is a random error?

a. Faulty scale
b. Wrong zero
c. Observer reaction time
d. Miscalibrated instrument

Correct answer: c. Observer reaction time

Explanation:
Human reaction time varies randomly.

MCQ 25

The SI unit of pressure is:

a. Pascal
b. Newton
c. Joule
d. Watt

Correct answer: a. Pascal

Explanation:
Pressure = force/area, unit Pascal.

MCQ 26

Which of the following is a fundamental unit?

a. Newton
b. Watt
c. Ampere
d. Joule

Correct answer: c. Ampere

Explanation:
Ampere is an SI base unit.

MCQ 27

The dimensional formula of density is:

a. [ML⁻³]
b. [ML³]
c. [M⁻¹L⁻³]
d. [ML⁻²T⁻¹]

Correct answer: a. [ML⁻³]

Explanation:
Density = mass/volume.

MCQ 28

Which quantity has no units?

a. Mass
b. Length
c. Strain
d. Time

Correct answer: c. Strain

Explanation:
Strain is a ratio of lengths, dimensionless.

MCQ 29

The SI unit of electric potential difference is:

a. Ohm
b. Volt
c. Ampere
d. Coulomb

Correct answer: b. Volt

Explanation:
Volt is the unit of voltage.

MCQ 30

Which of the following is a product of base units?

a. Newton
b. Kilogram
c. Second
d. Kelvin

Correct answer: a. Newton

Explanation:
Newton = kg·m·s⁻² (product of base units).

MCQ 31

Significant figures indicate:

a. Instrument colour
b. Measurement uncertainty
c. Unit size
d. Range

Correct answer: b. Measurement uncertainty

Explanation:
They show reliability and precision of measurements.

MCQ 32

How many significant figures are in 0.00520?

a. 2
b. 3
c. 4
d. 5

Correct answer: b. 3

Explanation:
Leading zeros are not significant, but trailing zero after decimal is significant.

MCQ 33

Which of the following is written correctly in SI form?

a. 10 meter
b. 10m
c. 10 M
d. 10Meter

Correct answer: b. 10m

Explanation:
Space between number and unit symbol, lowercase m.

MCQ 34

Dimensional analysis is used to:

a. Measure temperature
b. Convert units
c. Check equations
d. Find mass

Correct answer: c. Check equations

Explanation:
It checks homogeneity of equations.

MCQ 35

Which equation is dimensionally correct?

a. s = vt
b. s = v + t
c. s = v/t
d. s = vt²

Correct answer: a. s = vt

Explanation:
Both sides have dimension of length.

MCQ 36

The dimensional formula of gravitational constant G is:

a. [M⁻¹L³T⁻²]
b. [ML³T⁻²]
c. [M⁻²L³T⁻²]
d. [ML⁻³T²]

Correct answer: a. [M⁻¹L³T⁻²]

Explanation:
From Newton’s law of gravitation.

MCQ 37

Which of the following is a physical constant?

a. Mass of book
b. Length of table
c. Speed of light
d. Height of student

Correct answer: c. Speed of light

Explanation:
Speed of light has fixed universal value.

MCQ 38

The SI unit of magnetic flux is:

a. Tesla
b. Weber
c. Henry
d. Gauss

Correct answer: b. Weber

Explanation:
Weber is SI unit of magnetic flux.

MCQ 39

Which of the following quantities has dimensions [ML²T⁻²]?

a. Power
b. Energy
c. Momentum
d. Pressure

Correct answer: b. Energy

Explanation:
Energy = work = force × distance.

MCQ 40

Which of the following is an example of derived unit expressed in base units?

a. m
b. s
c. kg
d. kg·m²·s⁻³

Correct answer: d. kg·m²·s⁻³

Explanation:

This is the base unit form of watt (power).

MCQ 41

The SI unit of frequency is:

a. Hertz
b. Joule
c. Watt
d. Newton

Correct answer: a. Hertz

Explanation:
Frequency = number of cycles per second, unit is hertz (Hz).

MCQ 42

Which of the following is NOT an SI unit?

a. Newton
b. Joule
c. Dyne
d. Pascal

Correct answer: c. Dyne

Explanation:
Dyne is a CGS unit, not SI.

MCQ 43

The dimensional formula of momentum is:

a. [MLT⁻¹]
b. [ML²T⁻¹]
c. [MLT⁻²]
d. [M⁻¹LT⁻¹]

Correct answer: a. [MLT⁻¹]

Explanation:
Momentum = mass × velocity.

MCQ 44

Which quantity has the dimension [T⁻¹]?

a. Velocity
b. Frequency
c. Time
d. Energy

Correct answer: b. Frequency

Explanation:
Frequency is reciprocal of time.

MCQ 45

The SI unit of force is derived from:

a. meter and second
b. kilogram and second
c. kilogram, meter and second
d. ampere and second

Correct answer: c. kilogram, meter and second

Explanation:
Force = kg·m·s⁻².

MCQ 46

Which of the following is a vector quantity?

a. Distance
b. Speed
c. Velocity
d. Energy

Correct answer: c. Velocity

Explanation:
Velocity has both magnitude and direction.

MCQ 47

The dimensional formula of power is:

a. [ML²T⁻²]
b. [ML²T⁻³]
c. [MLT⁻²]
d. [M⁻¹L²T⁻³]

Correct answer: b. [ML²T⁻³]

Explanation:
Power = work/time.

MCQ 48

Which of the following is a scalar quantity?

a. Displacement
b. Force
c. Energy
d. Acceleration

Correct answer: c. Energy

Explanation:
Energy has magnitude only.

MCQ 49

The SI unit of density is:

a. kg/m
b. kg/m²
c. kg/m³
d. g/cm³

Correct answer: c. kg/m³

Explanation:
Density = mass/volume.

MCQ 50

The SI prefix for 10⁻¹² is:

a. nano
b. pico
c. micro
d. femto

Correct answer: b. pico

Explanation:
Pico = 10⁻¹².

MCQ 51

The SI prefix for 10⁻¹⁵ is:

a. pico
b. femto
c. nano
d. atto

Correct answer: b. femto

Explanation:
Femto = 10⁻¹⁵.

MCQ 52

Which quantity has the dimension [ML⁻¹T⁻²]?

a. Pressure
b. Energy
c. Force
d. Power

Correct answer: a. Pressure

Explanation:
Pressure = force/area.

MCQ 53

Which of the following is dimensionless?

a. Density
b. Velocity
c. Coefficient of friction
d. Force

Correct answer: c. Coefficient of friction

Explanation:
It is a ratio of forces.

MCQ 54

The SI unit of resistance is:

a. Ampere
b. Volt
c. Ohm
d. Coulomb

Correct answer: c. Ohm

Explanation:
Resistance is measured in ohms.

MCQ 55

Which of the following is NOT a supplementary unit?

a. Radian
b. Steradian
c. Meter
d. None

Correct answer: c. Meter

Explanation:
Meter is a base unit.

MCQ 56

Which is the correct SI notation?

a. Km
b. KM
c. km
d. kM

Correct answer: c. km

Explanation:
k is lowercase for kilo, m is meter.

MCQ 57

Dimensional homogeneity means:

a. Units must be same
b. Dimensions must be same
c. Values must be equal
d. Constants must be same

Correct answer: b. Dimensions must be same

Explanation:
Each term in an equation must have same dimensions.

MCQ 58

Which of the following equations is dimensionally incorrect?

a. v = s/t
b. a = v/t
c. s = v + at
d. s = vt

Correct answer: c. s = v + at

Explanation:
Velocity and acceleration×time have different dimensions.

MCQ 59

The SI unit of magnetic field is:

a. Weber
b. Tesla
c. Henry
d. Gauss

Correct answer: b. Tesla

Explanation:
Tesla is SI unit of magnetic field.

MCQ 60

Which of the following quantities has the dimension [L/T]?

a. Acceleration
b. Velocity
c. Force
d. Work

Correct answer: b. Velocity

Explanation:
Velocity = distance/time.

MCQ 61

Which of the following is NOT a systematic error?

a. Zero error
b. Calibration error
c. Human reaction time
d. Faulty scale

Correct answer: c. Human reaction time

Explanation:
It varies randomly, so random error.

MCQ 62

If least count is 0.2 cm, maximum error is:

a. 0.1 cm
b. 0.2 cm
c. 0.4 cm
d. 0.05 cm

Correct answer: a. 0.1 cm

Explanation:
Maximum error = least count / 2.

MCQ 63

The SI unit of charge per unit time is:

a. Coulomb
b. Volt
c. Ampere
d. Ohm

Correct answer: c. Ampere

Explanation:
Current = charge/time.

MCQ 64

Which of the following has dimensions [M]?

a. Force
b. Energy
c. Mass
d. Time

Correct answer: c. Mass

Explanation:
Mass is a base quantity.

MCQ 65

The dimensional formula of surface tension is:

a. [MT⁻²]
b. [MLT⁻²]
c. [ML⁻¹T⁻²]
d. [M⁻¹LT⁻²]

Correct answer: a. [MT⁻²]

Explanation:
Surface tension = force/length.

MCQ 66

Which quantity has the dimension [ML²T⁻¹]?

a. Force
b. Angular momentum
c. Energy
d. Power

Correct answer: b. Angular momentum

Explanation:
Angular momentum = Iω.

MCQ 67

The SI unit of capacitance is:

a. Ohm
b. Farad
c. Tesla
d. Henry

Correct answer: b. Farad

Explanation:
Capacitance is measured in farads.

MCQ 68

Which of the following is a base unit in SI?

a. Joule
b. Newton
c. Mole
d. Pascal

Correct answer: c. Mole

Explanation:
Mole is the base unit of amount of substance.

MCQ 69

How many significant figures are in 2.500?

a. 2
b. 3
c. 4
d. 5

Correct answer: c. 4

Explanation:
Trailing zeros after decimal are significant.

MCQ 70

How many significant figures are in 0.00032?

a. 2
b. 3
c. 4
d. 5

Correct answer: a. 2

Explanation:
Leading zeros are not significant.

MCQ 71

The SI unit of inductance is:

a. Farad
b. Henry
c. Tesla
d. Weber

Correct answer: b. Henry

Explanation:
Inductance is measured in henry.

MCQ 72

Which of the following is a dimensional constant?

a. Velocity of car
b. Speed of light
c. Height of building
d. Weight of book

Correct answer: b. Speed of light

Explanation:
It has fixed universal value.

MCQ 73

Which quantity has no dimension but has a unit?

a. Angle
b. Strain
c. Force
d. Energy

Correct answer: a. Angle

Explanation:
Plane angle is dimensionless but has unit radian.

MCQ 74

Which of the following is written incorrectly in SI?

a. 5 kg
b. 10 m
c. 20 Sec
d. 15 A

Correct answer: c. 20 Sec

Explanation:
Second symbol is “s”, not “Sec”.

MCQ 75

The dimensional formula of gravitational acceleration g is:

a. [LT⁻¹]
b. [LT⁻²]
c. [L²T⁻¹]
d. [MT⁻²]

Correct answer: b. [LT⁻²]

Explanation:
g is acceleration.

MCQ 76

Which of the following is a derived unit of SI?

a. Kelvin
b. Meter
c. Second
d. Volt

Correct answer: d. Volt

Explanation:
Volt is derived from base units.

MCQ 77

Which of the following has the dimension [M⁰L⁰T⁰]?

a. Velocity
b. Force
c. Strain
d. Power

Correct answer: c. Strain

Explanation:
Strain is dimensionless.

MCQ 78

The SI unit of luminous flux is:

a. Candela
b. Lux
c. Lumen
d. Watt

Correct answer: c. Lumen

Explanation:
Lumen is unit of luminous flux.

MCQ 79

Which of the following is NOT a fundamental physical quantity?

a. Length
b. Mass
c. Time
d. Energy

Correct answer: d. Energy

Explanation:
Energy is derived.

MCQ 80

The SI unit of solid angle is:

a. Degree
b. Radian
c. Steradian
d. Candela

Correct answer: c. Steradian

Explanation:
Steradian is supplementary unit.

MCQ 81

If a quantity X ∝ A^2 B^3, and fractional uncertainties in A and B are 1% and 2%, fractional uncertainty in X is:

a. 7%
b. 8%
c. 6%
d. 5%

Correct answer: b. 8%

Explanation:
Fractional uncertainty = 2×1% + 3×2% = 2 + 6 = 8%.

MCQ 82

Which quantity has the dimension [ML²T⁻³]?

a. Power
b. Energy
c. Force
d. Momentum

Correct answer: a. Power

Explanation:
Power = work/time.

MCQ 83

The SI prefix for 10⁶ is:

a. kilo
b. mega
c. giga
d. tera

Correct answer: b. mega

Explanation:
Mega = 10⁶.

MCQ 84

Which of the following is a CGS unit of force?

a. Newton
b. Dyne
c. Joule
d. Watt

Correct answer: b. Dyne

Explanation:
Dyne is CGS unit.

MCQ 85

The SI unit of pressure in base units is:

a. kg·m⁻¹·s⁻²
b. kg·m·s⁻²
c. kg·m²·s⁻³
d. kg·s⁻²

Correct answer: a. kg·m⁻¹·s⁻²

Explanation:
Pressure = force/area.

MCQ 86

Using dimensional analysis, the period T of a simple pendulum depends on length l and acceleration due to gravity g. Which form is correct?

a. $T ∝ l g$
b. $T ∝ \sqrt{l/g}$
c. $T ∝ l/g$
d. $T ∝ g/l$

Correct answer: b. $T ∝ \sqrt{l/g}$

Explanation:
[T] = [L⁰T¹], solve for exponents → T ∝ √(l/g).

MCQ 87

Which quantity has the dimension [ML⁻²T⁻²]?

a. Pressure
b. Energy
c. Force
d. Momentum

Correct answer: a. Pressure

Explanation:
Pressure = force/area.

MCQ 88

Which of the following is dimensionally same as torque?

a. Force
b. Work
c. Velocity
d. Pressure

Correct answer: b. Work

Explanation:
Torque and work have same dimensions.

MCQ 89

Which is the SI unit of electric power?

a. Joule
b. Volt
c. Watt
d. Ohm

Correct answer: c. Watt

Explanation:
Electric power is measured in watt.

MCQ 90

Which prefix means 10⁻³?

a. milli
b. micro
c. nano
d. pico

Correct answer: a. milli

Explanation:
Milli = 10⁻³.

MCQ 91

Which of the following has dimension [L]?

a. Velocity
b. Length
c. Area
d. Volume

Correct answer: b. Length

Explanation:
Length is a base quantity.

MCQ 92

Which of the following is NOT a derived unit?

a. Newton
b. Joule
c. Pascal
d. Second

Correct answer: d. Second

Explanation:
Second is a base unit.

MCQ 93

Check the dimensional correctness of $v^2 = 2 a s$ . Which is true?

a. Dimensionally correct
b. Incorrect; LHS ≠ RHS
c. Incorrect; dimensionless error
d. Cannot decide

Correct answer: a. Dimensionally correct

Explanation:
[v²] = [L²T⁻²], [2as] = [L/T²][L] = [L²T⁻²] → homogeneous.

MCQ 94

Which of the following is a derived physical quantity?

a. Time
b. Temperature
c. Electric current
d. Velocity

Correct answer: d. Velocity

Explanation:
Velocity is derived from length and time.

MCQ 95

Which of the following is dimensionally equivalent to impulse?

a. Force
b. Momentum
c. Work
d. Power

Correct answer: b. Momentum

Explanation:
Impulse = change in momentum.

MCQ 96

The dimensional formula of electric current is:

a. [I]
b. [Q/T]
c. [ML²T⁻³]
d. [LT⁻¹]

Correct answer: a. [I]

Explanation:
Electric current is a base quantity.

MCQ 97

Which of the following is a fundamental constant?

a. π
b. e
c. Speed of light
d. Length of rod

Correct answer: c. Speed of light

Explanation:
It is a physical constant with dimensions.

MCQ 98

Which quantity has the dimension [M⁰L²T⁰]?

a. Velocity
b. Area
c. Volume
d. Force

Correct answer: b. Area

Explanation:
Area = L².

MCQ 99

Which of the following is dimensionless but variable?

a. π
b. Coefficient of friction
c. Speed of light
d. Gravitational constant

Correct answer: b. Coefficient of friction

Explanation:
It has no units but its value changes.

MCQ 100

Which of the following is used to express very large numbers conveniently?

a. Prefix system
b. Dimensional analysis
c. Scientific notation
d. SI base units

Correct answer: c. Scientific notation

Explanation:
Scientific notation simplifies very large or small values.

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