NCERT Exemplar Class 11 Physics Solutions-Units and Measurements

February 11, 2025November 29, 2024 by Neeraj Anand, Param Anand

NCERT Exemplar Class 11 Physics Chapter Units and Measurements are provided for the students in their CBSE Class 11 examination and competitive examinations.

NCERT Exemplar Class 11 Physics Chapter Units and Measurements consists of questions from the NCERT Exemplar book along with extra questions prepared by subject experts at ANAND CLASSES (A School Of Competitions). NCERT Exemplar Class 11 Physics Chapter Units and Measurements also comprises important questions from the previous years’ question papers and sample papers.

NCERT Exemplar Solutions for Class 11 Physics Chapter Units and Measurements

Multiple-choice Questions I

2.1. The number of significant figures in 0.06900 is:

a) 5

b) 4

c) 2

d) 3

Answer:

The correct answer is b) 4

The number of zeroes on the left of the non-zero number is not considered as significant figures but the zeroes that are on the right of the non-zero number are significant figures.

2.2. The sun of the numbers 436.32, 227.2, and 0.301 inappropriate significant figures is:

a) 663.821

b) 664

c) 663.8

d) 663.82

Answer:

The correct answer is c) 663.8

2.3. The mass and volume of a body are 4.237 g and 2.5 cm³, respectively. The density of the material of the body in correct significant figures is:

a) 1.6048 g/cm³

b) 1.69 g/cm³

c) 1.7 g/cm³

d) 1.695 g/cm³

Answer:

The correct answer is c) 1.7 g/cm³

2.4. The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give:

a) 2.75 and 2.74

b) 2.74 and 2.73

c) 2.75 and 2.73

d) 2.74 and 2.74

Answer:

The correct answer is d) 2.74 and 2.74

2.5. The length and breadth of a rectangular sheet are 16.2 cm and 10.1 cm, respectively. The area of the sheet inappropriate significant figures and error is:

a) 164 ± 3 cm²

b) 163.62 ± 2.6 cm²

c) 163.6 ± 2.6 cm²

d) 163.62 ± 3 cm²

Answer:

The correct answer is a) 164 ± 3 cm²

2.6. Which of the following pairs of physical quantities does not have the same dimensional formula?

a) work and torque

b) angular momentum and Planck’s constant

c) tension and surface tension

d) impulse and linear momentum

Answer:

The correct answer is a) work and torque

2.7. Measure of two quantities along with the precision of the respective measuring instrument is:

A = 2.5 m/s ± 0.5 m/s

B = 0.10 s ± 0.01 s

The value of AB will be

a) (0.25 ± 0.08) m

b) (0.25 ± 0.5) m

c) (0.25 ± 0.05) m

d) (0.25 ± 0.135) m

Answer:

The correct answer is a) (0.25 ± 0.08) m

2.8. You measure two quantities as A = 1.0 m ± 0.2 m, B = 2.0 m ± 0.2 m. We should report the correct value for √AB as:

a) 1.4 m ± 0.4 m

b) 1.41 m ± 0.15 m

c) 1.4 m ± 0.3 m

d) 1.4 m ± 0.2 m

Answer:

The correct answer is d) 1.4 m ± 0.2 m

2.9. Which of the following measurements is most precise?

a) 5.00 mm

b) 5.00 cm

c) 5.00 m

d) 5.00 km

Answer:

The correct answer is a) 5.00 mm

2.10. The mean length of an object is 5 cm. Which of the following measurements is most accurate?

a) 4.9 cm

b) 4.805 cm

c) 5.25 cm

d) 5.4 cm

Answer:

The correct answer is a) 4.9 cm

2.11. Young’s modulus of steel is 1.9 × 10¹¹ N/m². When expressed in CGS units of dynes/cm², it will be equal to:

a) 1.9 × 10¹⁰

b) 1.9 × 10¹¹

c) 1.9 × 10¹²

d) 1.9 × 10¹³

Answer:

The correct answer is c) 1.9 × 10¹²

2.12. If momentum (P), area (A), and time (T) are taken to be fundamental quantities, then energy has the dimensional formula

a) (P¹A^-1T¹)

b) (P²A¹T¹)

c) (P¹A^-1/2T¹)

d) (P¹A^1/2T^-1)

Answer:

The correct answer is d) (P¹A^1/2T^-1)

Multiple Choice Questions II

2.13. On the basis of dimensions, decide which of the following relations for the displacement of a particle undergoing simple harmonic motion is not correct:

a) y = a sin 2πt/T

b) y = a sin vt

c) y = a/T sin (t/a)

d) y = a√2 [sin (2 πt/T) – cos (2πt/T)]

Answer:

The correct answer is b) y = a sin vt and c) y = a/T sin (t/a)

2.14. If P, Q, and R are physical quantities having different dimensions, which of the following combinations can never be a meaningful quantity?

a) (P – Q)/R

b) PQ – R

c) PQ/R

d) (PR – Q²)/R

e) (R + Q)/P

Answer:

The correct answer is d) (PR – Q²)/R and e) (R + Q)/P

2.15. Photon is quantum of radiation with energy E = hv where v is frequency and h is Planck’s constant. The dimensions of h are the same as that of:

a) linear impulse

b) angular impulse

c) linear momentum

d) angular momentum

Answer:

The correct option is b) angular impulse and d) angular momentum

2.16. If Planck’s constant (h) and speed of light in vacuum (c) are taken as two fundamental quantities, which of the following can also be taken to express length, mass, and time in terms of the three chosen fundamental quantities?

a) mass of the electron (m_e)

b) universal gravitational constant (G)

c) charge of the electron (e)

d) mass of proton (m_p)

Answer:

The correct answer is a) mass of electron b) universal gravitational constant and d) mass of proton

2.17. Which of the following ratios express pressure?

a) Force/area

b) Energy/volume

c) Energy/area

d) Force/volume

Answer:

The correct answer is a) force/area and b) energy/volume

2.18. Which of the following are not a unit of time?

a) second

b) parsec

c) year

d) light year

Answer:

The correct answer is b) parsec and d) light year

Very Short Answers

2.19 Why do we have different units for the same physical quantity?

Answer:

We have different units for the same physical quantity because they differ from place to place.

2.20 The radius of an atom is of the order of 1 Å, and radius of nucleus is of the order of fermi. How many magnitudes higher is the volume of the atom as compared to the volume of the nucleus?

Answer:

Radius of atom = 1 Å = 10^-10 m

Radius of nucleus = 1 fermi = 10^-15 m

Volume of atom = 4/3πRa³

Volume of nucleus = 4/3πRn³

Vatom/Vnucleus = 10¹⁵

Mass of one mole of carbon atom = 12 g = 1.67 × 10^-27 kg

2.21 Name the device used for measuring the mass of atoms and molecules.

Answer:

Mass spectrograph is the device that is used for measuring the mass of atoms and molecules.

Short Answers

2.25 (a) The earth-moon distance is about 60 earth radius. What will be the diameter of the earth (approximately in degrees) as seen from the moon?

(b) Moon is seen to be of (½)° diameter from the earth. What must be the relative size compared to the earth?

(c) From parallax measurement, the sun is found to be at a distance of about 400 times the earth-moon distance. Estimate the ratio of sun-earth diameters.

Answer:

NCERT Exemplar Class 11 Physics Chapter Units and Measurements are provided for the students in their CBSE Class 11 examination and competitive examinations.

The radius of the earth is treated as an arc as the distance between the moon and the earth is greater than the radius of the earth.

Let Re be the length of the arc

Distance between the moon and the earth = 60Re

Angle subtended by the diameter of the earth = 2^o

b) The relative size of the moon, when compared to the earth, is = diameter of the earth/diameter of the moon = 4

c) The ratio of sun-earth diameter = Dsun/Dearth = 100

2.26 Which of the following time measuring devices is most precise?

(a) A wall clock.

(b) A stopwatch.

(c) A digital watch.

(d) An atomic clock.

Give the reason for your answer.

Answer:

The correct option is d) an atomic clock as it measures up to one second.

2.27 The distance of a galaxy is of the order of 1025 m. Calculate the order of magnitude of time taken by light to reach us from the galaxy.

Answer:

Distance of the galaxy = 10²⁵m

Speed of light = 3 × 10⁸ m/s

Time taken, t is

t = distance/speed = 3.33 × 10¹⁶ s

2.28 The vernier scale of a travelling microscope has 50 divisions which coincide with 49 main scale divisions. If each main scale division is 0.5 mm, calculate the minimum inaccuracy in the measurement of distance.

Answer:

The minimum inaccuracy in the measurement of distance = (1/50)(0/5)mm = 0.01 mm

2.29 During a total solar eclipse-the moon almost entirely covers the sphere of the sun. Write the relation between the distances and sizes of the sun and moon.

Answer:

Rme is the distance of the moon from the earth

Rse is the distance of the sun from the moon

Asun is the area of the sun

Amoon is the area of the moon

Rs/Rm = Rse/Rme

2.30 If the unit of force is 100 N, unit of length is 10 m and unit of time is 100 s, what is the unit of mass in this system of units?

Answer:

Force [F] = 100 N

Length [L] = 10 m

Time [t] = 100 s

[F] = [MLT²]

Substituting the values, we get M = 10⁵ kg

Long Answers

2.36. A new system of units is proposed in which unit of mass is α kg, unit of length β m and unit of time γ s. How much will 5 J measure in this new system?

Answer:

Let Q be the physical quantity = n1u1 = n2u2

Let M1, L1, T1 and M2,L2,T2 be the units of mass, length, and time for the given two systems.

n2 = n1

[U] = [ML²T²]

M1 = 1 kg

L1 = 1 m

T1 = 1 s

M2 = α kg

L2 = β m

T1 = γ s

Substituting the values we get, n2 = 5γ²/αβ² J

2.37 The volume of a liquid flowing out per second of a pipe of length l and radius r is written by a student as
where P is the pressure difference between the two ends of the pipe and η is coefficient of viscosity of the liquid having dimensional formula ML^–1T^–1. Check whether the equation is dimensionally correct.

Answer:

Dimension of the given physical quantity is

[V] = dimension of volume/dimension of time = [L³]/[T]=[ML^-1T^-2]

LHS = [L³T^-1]

RHS = [L³T^-1]

LHS = RHS

Therefore, the equation is correct.

2.38 A physical quantity X is related to four measurable quantities a, b, c and d as follows: X = a² b³ c^5/2 d^–2. The percentage error in the measurement of a, b, c and d are 1%, 2%, 3% and 4%, respectively. What is the percentage error in quantity X? If the value of X calculated on the basis of the above relation is 2.763, to what value should you round off the result.

Answer:

The given physical quantity, X = a² b³ c^5/2 d^–2

Percentage error in X = (∆x/x)(100)

Percentage error in a = (∆a/a)(100) = 1%

Percentage error in b = (∆b/b)(100) = 2%

Percentage error in c = (∆c/c)(100) = 3%

Percentage error in d = (∆d/d)(100) = 4%

Maximum percentage error in X = ±23.5%

X should have two significant values, therefore, X = 2.8

2.39 In the expression P = E l² m^–5 G^–2, E, m, l and G denote energy, mass, angular momentum and gravitational constant, respectively. Show that P is a dimensionless quantity.

Answer:

From the problem, P = E l² m^–5 G^–2

E is the energy = [ML²T^-2]

m is the mass = [M]

L is the angular momentum = [ML²T¹]

G is the gravitational constant = [M^-1L²T²]

Substituting the values we get, [P] = [M⁰L⁰T⁰]

2.40 If the velocity of light c, Planck’s constant h and gravitational constant G are taken as fundamental quantities then express mass, length and time in terms of dimensions of these quantities.

Answer:

The principle of homogeneity is used to solve this problem

[h] = [ML²T¹]
[c] = [LT^-1]
[G] = [M^-1L³T^-2]

Let m = kc^ah^bG^c

Solving the above we get,

m = kc^1/2h^1/2G^-1/2 = k√ch/G

Let L = kc^ah^bG^c

Solving the above we get,

L = kc^-3/2h^1/2G^1/2 = k√hG/c³

Let T = c^ah^bG^c

Solving the above we get,

L = kc^-5/2h^1/2G^1/2 = k√hG/c⁵

2.41. An artificial satellite is revolving around a planet of mass M and radius R, in a circular orbit of radius r. From Kepler’s third law about the period of a satellite around a common central body, square of the period of revolution T is proportional to the cube of the radius of the orbit r. Show using dimensional analysis, that T = k/R √r3/g where k is a dimensionless constant and g is acceleration due to gravity.

Answer:

From Kepler’s third law, we know that

T2 a3 where T2 is the square of time period of the satellite revolving around a planet and is proportional to the cube of the radius of the orbit r3.

T2 r3

T r3/2

T depends on R and g

T r3/2gaRb

2.42. In an experiment to estimate the size of a molecule of oleic acid, 1mL of oleic acid is dissolved in 19mL of alcohol. Then 1mL of this solution is diluted to 20mL by adding alcohol. Now, 1 drop of this diluted solution is placed on water in a shallow trough. The solution spreads over the surface of water, forming one molecule thick layer. Now, lycopodium powder is sprinkled evenly over the film, we can calculate the thickness of the film, which will give us the size of oleic acid molecule.

Read the passage carefully and answer the following questions:

a) Why do we dissolve oleic acid in alcohol?

b) What is the role of lycopodium powder?

c) What would be the volume of oleic acid in each mL of solution prepared?

d) How will you calculate the volume of n drops of this solution of oleic.

e) What will be the volume of oleic acid in one drop of this solution?

Answer:

a) Oleic is dissolved in the alcohol because it does not get dissolved in water.

b) With the help of lycopodium powder one can measure the area over which the oleic acid spreads as lycopodium powder clears the circular area when oleic acid is added.

c) 20mL of oleic acid contains 1mL of oleic acid.

This means that each mL of solution contains 1/20 mL of oleic acid.

1mL of this solution is diluted to 20mL by adding alcohol.

Therefore, each mL of solution prepared, volume of oleic acid = (1/20)(1/20) = 1/400mL

d) To calculate the volume of n drops of this solution of oleic, burette and measuring cylinder can be used.

e) The volume of oleic acid in one drop = 1/400mL

2.43. a) How many astronomical units (AU) make 1 parsec?

b) Consider the sun like a star at a distance of 2 parsecs. When it is seen through a telescope with 100 magnification, what should be the angular size of the star? Sun appears to be (1/2) degree from the earth. Due to atmospheric fluctuations, eye cannot resolve objects smaller than 1 arc minute.

c) Mars has approximately half of the earth’s diameter. When it is closer to the earth it is at about ½ AU from the earth. Calculate at what size it will disappear when seen through the same telescope.

Answer:

a) From the definition, 1 parsec is equal to the distance at which 1 AU long arc subtends an angle of 1s.

Using the definition, we can say that

1 parsec = (3600)(180)/π AU

= 206265 AU

= 2 × 10⁵ AU

b) Given that the sun’s angular diameter from the earth is 1/2 degree at 1 AU.

Angular diameter of the sun-like star at a distance of 2 parsec

= [(1/2)/(2)(2)(105)] degree

= 1/8 × 10^-5 degree

= 7.5 × 10^-5 arcmin

When the sun appears like a start through the telescope that has a magnification of 100, the angular diameter of the star is

= (100)(7.5 × 10^-5)

= 7.5 × 10^-3 arcmin

But the angular size of the sun appears as 1 arcmin to the eyes as the eyes cannot resolve smaller than 1 arcmin because of atmospheric fluctuations.

c) Given that,

Dmars/Dearth = 1/2

We also know that Dearth/Dsun = 1/100

Therefore, Dmars/Dsun = 1/2 × 1/100

At 1AU, the sun’s diameter = (1/2) degree

Therefore, diameter of mars = (1/400) degree

At 1/2 AU, mars diameter = (1/400)(2) = (1/200) degree

With 100 magnification, mars diameter = (1/2) degree = 30’

Therefore, it can be said that the value is larger than the resolution limit because of atmospheric fluctuations and hence it looks magnified.

2.44. Einstein’s mass-energy relation emerging out of his famous theory of relativity relates mass (m) to energy (E) as E = mc², where c is the speed of light in vacuum. At the nuclear level, the magnitudes of energy are very small. The energy at nuclear level is usually measured in MeV where 1 MeV = 1.6 × 10^-13J, the masses are measured in unified equivalent of 1u is 931.5 MeV.

a) Show that the energy equivalent of 1 u is 931.5 MeV.

b) A student writes the relation as 1 u = 931.5 MeV. The teacher points out that the relation is dimensionally incorrect. Write the correct relation.

Answer:

a) Using Einstein’s mass-energy relation, the energy that is equivalent to the given mass can be calculated

1 amu = 1 u = 1.67 × 10^-27 kg

Applying E = mc²

E = 931.5 MeV

b) As E = mc²

m = E/c²

Which means that 1u = 931.5 MeV/c²

The dimensionally correct relation of 1 amu = 931.5 MeV

Class 11 Chapter 2 Physics Exemplar Concepts for Units and Measurement

Section Number	Topic
1	The International System of Units
2.	Measurement of Length
3	Measurement of Mass
4	Measurement of Time
5	Accuracy, Precision of Instruments and Errors in Measurement
6	Significant Figures
7	Dimensions of Physical Quantities
8	Dimensional Formulae and Dimensional Equations
9	Dimensional Analysis and Its Applications

Why Opt for ANAND CLASSES (A School Of Competitions)?

ANAND CLASSES (A School Of Competitions) motto is to create top-quality learning content for students. With the focus on boosting students’ learning capabilities, NCERT Exemplar Solutions provided here are framed by our expert faculty with over a decade of experience. ANAND CLASSES (A School Of Competitions) NCERT Solutions for Class 11 Physics Chapter 2 will help students practise and revise different topics from their homes.

Neeraj Anand, Param Anand

Er. Neeraj K.Anand is a freelance mentor and writer who specializes in Engineering & Science subjects. Neeraj Anand received a B.Tech degree in Electronics and Communication Engineering from N.I.T Warangal & M.Tech Post Graduation from IETE, New Delhi. He has over 30 years of teaching experience and serves as the Head of Department of ANAND CLASSES. He concentrated all his energy and experiences in academics and subsequently grew up as one of the best mentors in the country for students aspiring for success in competitive examinations. In parallel, he started a Technical Publication "ANAND TECHNICAL PUBLISHERS" in 2002 and Educational Newspaper "NATIONAL EDUCATION NEWS" in 2014 at Jalandhar. Now he is a Director of leading publication "ANAND TECHNICAL PUBLISHERS", "ANAND CLASSES" and "NATIONAL EDUCATION NEWS". He has published more than hundred books in the field of Physics, Mathematics, Computers and Information Technology. Besides this he has written many books to help students prepare for IIT-JEE and AIPMT entrance exams. He is an executive member of the IEEE (Institute of Electrical & Electronics Engineers. USA) and honorary member of many Indian scientific societies such as Institution of Electronics & Telecommunication Engineers, Aeronautical Society of India, Bioinformatics Institute of India, Institution of Engineers. He has got award from American Biographical Institute Board of International Research in the year 2005.

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CBSE Unit-wise Class 11 Physics Syllabus

Below we have provided the details of the CBSE Physics topics under each unit as per the revised CBSE Class 11 Physics Syllabus for the 2023-24 academic year. Go through it to get the details of the chapters given below.

Unit-I: Physical World and Measurement

Chapter 2: Units and Measurements

Need for measurement: Units of measurement; systems of units; SI units, fundamental and derived units. Length, mass and time measurements; accuracy and precision of measuring instruments; errors in measurement; significant figures.

Dimensions of physical quantities, dimensional analysis and its applications.

Unit-II: Kinematics

Chapter 3: Motion in a Straight Line

Frame of reference, Motion in a straight line, Elementary concepts of differentiation and integration for describing motion, uniform and nonuniform motion, and instantaneous velocity, uniformly accelerated motion, velocity-time and position-time graphs. Relations for uniformly accelerated motion (graphical treatment).

Chapter 4: Motion in a Plane

Scalar and vector quantities; position and displacement vectors, general vectors and their notations; equality of vectors, multiplication of vectors by a real number; addition and subtraction of vectors, relative velocity, Unit vector; resolution of a vector in a plane, rectangular components, Scalar and Vector product of vectors.

Motion in a plane, cases of uniform velocity and uniform acceleration-projectile motion, uniform circular motion.

Unit-III: Laws of Motion

Chapter 5: Laws of Motion

Intuitive concept of force, Inertia, Newton’s first law of motion; momentum and Newton’s second law of motion; impulse; Newton’s third law of motion (recapitulation only). Law of conservation of linear momentum and its applications. Equilibrium of concurrent forces, Static and kinetic friction, laws of friction, rolling friction, lubrication.

Dynamics of uniform circular motion: Centripetal force, examples of circular motion (vehicle on a level circular road, vehicle on a banked road).

Unit-IV: Work, Energy and Power

Chapter 6: Work, Energy and Power

Work done by a constant force and a variable force; kinetic energy, work-energy theorem, power.

Notion of potential energy, potential energy of a spring, conservative forces: conservation of mechanical energy (kinetic and potential energies); non-conservative forces: motion in a vertical circle; elastic and inelastic collisions in one and two dimensions.

Unit-V: Motion of System of Particles and Rigid Body

Chapter 7: System of Particles and Rotational Motion

Centre of mass of a two-particle system, momentum conservation and centre of mass motion. Centre of mass of a rigid body; centre of mass of a uniform rod. Moment of a force, torque, angular momentum, law of conservation of angular momentum and its applications.

Equilibrium of rigid bodies, rigid body rotation and equations of rotational motion, comparison of linear and rotational motions.

Moment of inertia, radius of gyration, values of moments of inertia for simple geometrical objects (no derivation).

Unit-VI: Gravitation

Chapter 8: Gravitation

Kepler’s laws of planetary motion, universal law of gravitation. Acceleration due to gravity and its variation with altitude and depth. Gravitational potential energy and gravitational potential, escape speed, orbital velocity of a satellite.

Unit-VII: Properties of Bulk Matter

Chapter 9: Mechanical Properties of Solids

Elasticity, Stress-strain relationship, Hooke’s law, Young’s modulus, bulk modulus, shear modulus of rigidity (qualitative idea only), Poisson’s ratio; elastic energy.

Chapter 10: Mechanical Properties of Fluids

Pressure due to a fluid column; Pascal’s law and its applications (hydraulic lift and hydraulic brakes), effect of gravity on fluid pressure.

Viscosity, Stokes’ law, terminal velocity, streamline and turbulent flow, critical velocity, Bernoulli’s theorem and its applications.

Surface energy and surface tension, angle of contact, excess of pressure across a curved surface, application of surface tension ideas to drops, bubbles and capillary rise.

Chapter 11: Thermal Properties of Matter

Heat, temperature,( recapitulation only) thermal expansion; thermal expansion of solids, liquids and gases, anomalous expansion of water; specific heat capacity; Cp, Cv – calorimetry; change of state – latent heat capacity.

Heat transfer-conduction, convection and radiation (recapitulation only), thermal conductivity, qualitative ideas of Blackbody radiation, Wein’s displacement Law, Stefan’s law.

Unit-VIII: Thermodynamics

Chapter 12: Thermodynamics

Thermal equilibrium and definition of temperature (zeroth law of thermodynamics), heat, work and internal energy. First law of thermodynamics, Second law of thermodynamics: gaseous state of matter, change of condition of gaseous state -isothermal, adiabatic, reversible, irreversible, and cyclic processes.

Unit-IX: Behaviour of Perfect Gases and Kinetic Theory of Gases

Chapter 13: Kinetic Theory

Equation of state of a perfect gas, work done in compressing a gas.

Kinetic theory of gases – assumptions, concept of pressure. Kinetic interpretation of temperature; rms speed of gas molecules; degrees of freedom, law of equi-partition of energy (statement only) and application to specific heat capacities of gases; concept of mean free path, Avogadro’s number.

Unit-X: Oscillations and Waves

Chapter 14: Oscillations

Periodic motion – time period, frequency, displacement as a function of time, periodic functions and their application.

Simple harmonic motion (S.H.M) and its equations of motion; phase; oscillations of a loaded spring- restoring force and force constant; energy in S.H.M. Kinetic and potential energies; simple pendulum derivation of expression for its time period.

Chapter 15: Waves

Wave motion: Transverse and longitudinal waves, speed of travelling wave, displacement relation for a progressive wave, principle of superposition of waves, reflection of waves, standing waves in strings and organ pipes, fundamental mode and harmonics, Beats.

Students can also access the syllabus for other subjects by visiting Syllabus page of CBSE Class 11.

CBSE Syllabus for Class 11 Physics Practical

Below are the list of the experiments of Physics practicals.

Evaluation Scheme for Class 11 Physics Practical 2023-24

Topic	Marks
Two experiments, one from each section	7 + 7
Practical record (experiment and activities)	5
One activity from any section	3
Investigatory Project	3
Viva on experiments, activities and project	5
Total	30

CBSE Class 11 Physics Practical Syllabus

Section – A

CBSE 11 Physics Syllabus Experiments

1. To measure the diameter of a small spherical/cylindrical body and to measure internal diameter and depth of a given beaker/calorimeter using Vernier Callipers and hence find its volume.
2. To measure the diameter of a given wire and thickness of a given sheet using screw gauge.
3. To determine the volume of an irregular lamina using the screw gauge.
4. To determine the radius of curvature of a given spherical surface by a spherometer.
5. To determine the mass of two different objects using a beam balance.
6. To find the weight of a given body using parallelogram law of vectors.
7. Using a simple pendulum, plot its L-T² graph and use it to find the effective length of second’s pendulum.
8. To study variation of time period of a simple pendulum of a given length by taking bobs of same size but different masses and interpret the result.
9. To study the relationship between force of limiting friction and normal reaction and to find the co- efficient of friction between a block and a horizontal surface.
10. To find the downward force, along an inclined plane, acting on a roller due to gravitational pull of the earth and study its relationship with the angle of inclination θ by plotting graph between force and sin θ.

CBSE 11 Physics Syllabus Activities

1. To make a paper scale of given least count, e.g., 0.2cm, 0.5 cm.
2. To determine mass of a given body using a metre scale by principle of moments.
3. To plot a graph for a given set of data, with proper choice of scales and error bars.
4. To measure the force of limiting friction for rolling of a roller on a horizontal plane.
5. To study the variation in range of a projectile with angle of projection.
6. To study the conservation of energy of a ball rolling down on an inclined plane (using a double inclined plane).
7. To study dissipation of energy of a simple pendulum by plotting a graph between square of amplitude and time.

Section – B

CBSE 11 Physics Syllabus Experiments

1. To determine Young’s modulus of elasticity of the material of a given wire.
2. To find the force constant of a helical spring by plotting a graph between load and extension.
3. To study the variation in volume with pressure for a sample of air at constant temperature by plotting graphs between P and V, and between P and 1/V.
4. To determine the surface tension of water by capillary rise method.
5. To determine the coefficient of viscosity of a given viscous liquid by measuring terminal velocity of a given spherical body.
6. To study the relationship between the temperature of a hot body and time by plotting a cooling curve.
7. To determine specific heat capacity of a given solid by method of mixtures.
8. To study the relation between frequency and length of a given wire under constant tension using sonometer.
9. To study the relation between the length of a given wire and tension for constant frequency using sonometer.
10. To find the speed of sound in air at room temperature using a resonance tube by two resonance positions.

CBSE 11 Physics Syllabus Activities

1. To observe change of state and plot a cooling curve for molten wax.
2. To observe and explain the effect of heating on a bi-metallic strip.
3. To note the change in level of liquid in a container on heating and interpret the observations.
4. To study the effect of detergent on surface tension of water by observing capillary rise.
5. To study the factors affecting the rate of loss of heat of a liquid.
6. To study the effect of load on depression of a suitably clamped metre scale loaded at (i) its end (ii) in the middle.
7. To observe the decrease in pressure with increase in velocity of a fluid.

Practical Examination for Visually Impaired Students of Class 11 Evaluation Scheme

Time: 2 Hours
Max. Marks: 30

Topic	Marks
Identification/Familiarity with the apparatus	5
Written test (based on given/prescribed practicals)	10
Practical Record	5
Viva	10
Total	30

A. Items for Identification/Familiarity of the apparatus for assessment in practicals (All experiments).

Spherical ball, Cylindrical objects, vernier calipers, beaker, calorimeter, Screw gauge, wire, Beam balance, spring balance, weight box, gram and milligram weights, forcep, Parallelogram law of vectors apparatus, pulleys and pans used in the same ‘weights’ used, Bob and string used in a simple pendulum, meter scale, split cork, suspension arrangement, stop clock/stop watch, Helical spring, suspension arrangement used, weights, arrangement used for measuring extension, Sonometer, Wedges, pan and pulley used in it, ‘weights’ Tuning Fork, Meter scale, Beam balance, Weight box, gram and
milligram weights, forceps, Resonance Tube, Tuning Fork, Meter scale, Flask/Beaker used for adding water.

B. List of Practicals

1. To measure diameter of a small spherical/cylindrical body using vernier calipers.
2. To measure the internal diameter and depth of a given beaker/calorimeter using vernier calipers and hence find its volume.
3. To measure diameter of given wire using screw gauge.
4. To measure thickness of a given sheet using screw gauge.
5. To determine the mass of a given object using a beam balance.
6. To find the weight of given body using the parallelogram law of vectors.
7. Using a simple pendulum plot L-T and L-T2 graphs. Hence find the effective length of second’s pendulum using appropriate length values.
8. To find the force constant of given helical spring by plotting a graph between load and extension.
9. (i) To study the relation between frequency and length of a given wire under constant tension using a sonometer.
(ii) To study the relation between the length of a given wire and tension, for
constant frequency, using a sonometer.
10. To find the speed of sound in air, at room temperature, using a resonance tube, by observing the two resonance positions.

Note: The above practicals of CBSE 11 Physics Syllabus may be carried out in an experiential manner rather than recording observations.

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Frequently Asked Questions on CBSE Class 11 Physics Syllabus

According to the CBSE Class 11 Physics Syllabus, which are the units of high marks weightage?

According to the CBSE Class 11 Physics Syllabus, physical world and measurement, kinematics and laws of motion are the units of high-mark weightage.

How is the practical syllabus of the CBSE Class 11 Physics divided into sections A and B?

The practical syllabus of the CBSE Class 11 Physics contains 10 experiments in section A and 10 experiments in section B with 7 physical activities mentioned for each.

Which are the basic concepts present in the CBSE Syllabus for Class 11 Physics?

The basic concepts present in the CBSE Syllabus for Class 11 Physics are Thermodynamics, Laws of Motion, Oscillations and Waves.

NCERT Exemplar Solutions for Class 11 Physics Chapter Units and Measurements

Multiple-choice Questions I

Multiple Choice Questions II

Very Short Answers

Short Answers

Long Answers

Class 11 Chapter 2 Physics Exemplar Concepts for Units and Measurement

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CBSE Unit-wise Class 11 Physics Syllabus

Unit-I: Physical World and Measurement

Chapter 2: Units and Measurements

Unit-II: Kinematics

Chapter 3: Motion in a Straight Line

Chapter 4: Motion in a Plane

Unit-III: Laws of Motion

Chapter 5: Laws of Motion

Unit-IV: Work, Energy and Power

Chapter 6: Work, Energy and Power

Unit-V: Motion of System of Particles and Rigid Body

Chapter 7: System of Particles and Rotational Motion

Unit-VI: Gravitation

Chapter 8: Gravitation

Unit-VII: Properties of Bulk Matter

Chapter 9: Mechanical Properties of Solids

Chapter 10: Mechanical Properties of Fluids

Chapter 11: Thermal Properties of Matter

Unit-VIII: Thermodynamics

Chapter 12: Thermodynamics

Unit-IX: Behaviour of Perfect Gases and Kinetic Theory of Gases

Chapter 13: Kinetic Theory

Unit-X: Oscillations and Waves

Chapter 14: Oscillations

Chapter 15: Waves

CBSE Syllabus for Class 11 Physics Practical

CBSE Class 11 Physics Practical Syllabus

Section – A

Section – B

Practical Examination for Visually Impaired Students of Class 11 Evaluation Scheme

Frequently Asked Questions on CBSE Class 11 Physics Syllabus

According to the CBSE Class 11 Physics Syllabus, which are the units of high marks weightage?

How is the practical syllabus of the CBSE Class 11 Physics divided into sections A and B?

Which are the basic concepts present in the CBSE Syllabus for Class 11 Physics?

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