Strictly Based on the Latest Syllabus issued by CBSE Board for 2015 Examination

Chapter-Wise SolutionsQUESTION BANK

Physics

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CONTENTS

Syllabus v - viii

Solved Paper, 2014 (KVS) 1 - 15

Unit-I : Ph ysical W orld and M easurem ent

1. Ph ys ical World 1 - 9

2. Units and M easurem ent 10 - 30

Unit-II : Kinem atics

3. Motion in a Straigh t Line 31 - 52

4. Motion in a Plane 53 - 76

Unit-III : Law s of M otion

5. Law s of Motion 77 - 104

Unit-IV : W ork , Energy and Pow er

6. Work , Energy and Pow er 105 - 125

Unit-V : M otion of System of Particles and R igid Body

7. Rotational Particles and Rotational Motion 126 - 149

Unit-VI : Gravitation

8. Gravitation 150 - 169

Unit-VII : Propertie s of Bulk M atter

9 . Mech anical Propertie s of Solids 170 - 184

10. Mech anical Propertie s of Fluids 185 - 208

11. Th erm al Propertie s of Matter 209 - 227

Unit-VIII : Th e rm odynam ics

12. Th erm odynam ics 228 - 245

Unit-IX : Be h aviour of Perfect Gas and Kinetic Th eory

13. Beh aviour of Perfect Gas and Kinetic Th eory 246 - 264

Unit-X : O scillations and W aves

14. O scillations 265 - 284

15. Wave s 285 - 304

( iii )

CBSE always believes in Global Trends of Educational Transformation. The CBSE

curriculum gets its lead from National Curriculum Framework – 2005 and Right to Free and

Compulsory Education Act – 2009. The aim of CBSE Curriculum is not just to let learners

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PREFACE

Unit-I : Physical World and Measurement 10 PeriodsPhysics - scope and excitement; nature of physical laws; Physics, technology and society.

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 24 PeriodsFrame of reference, Motion in a straight line: Position-time graph, speed and velocity.

Elementary concepts of differentiation and integration for describing motion.Uniform and nonuniform

motion, average speed and instantaneous velocity. Uniformly accelerated motion, velocity time and position-time

graphs.

Relations for uniformly accelerated motion (graphical treatment).

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 14 PeriodsIntuitive 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.

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 banked road).

Unit IV : Work, Energy and Power 12 PeriodsWork 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 collisionsin one and two dimensions.

( v )

SYLLABUS( COURSE STRUCTURE)Class-XI (Theory)

One Paper Three Hours Max Marks : 70

Class-XI No. of Periods Marks

Unit-I Physical World & Measurement 10Unit-II Kinematics 24 23Unit-III Laws of Motion 14

Unit-IV Work, Energy & Power 12Unit-V Motion of System of particles & Rigid Body 18 17Unit-VI Gravitation 12

Unit-VII Properties of Bulk Matter 24Unit-VIII Thermodynamics 12 20Unit-XI Behaviour of Perfect Gas & Kinetic Theory of gases 08

Unit-X Oscillations & Waves 26 10

Total 160 70

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Unit V : Motion of System of Particles and Rigid Body 18 PeriodsCentre 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, laws of conservation of angular momentum and its applications.Equilibrium of rigid bodies, rigid body rotation and equations of rotational motion, comparison of linear and rotationalmotions.Moment of inertia, radius of gyration.Values of moments of inertia, for simple geometrical objects (no derivation).Statement of parallel and perpendicular axes theorems and their applications.Unit-VI : Gravitation 12 PeriodsKeplar’s laws of planetary motion.The universal law of gravitation.

Acceleration due to gravity and its variation with altitude and depth.Gravitational potential energy and gravitational potential. Escape velocity. Orbital velocity of a satellite. Geo-stationary satellites.Unit-VII : Properties of Bulk Matter 24 PeriodsElastic behaviour, Stress-strain relationship, Hooke’s law, Young’s modulus, bulk modulus, shearmodulus of rigidity, Poisson’s ratio; elastic energy.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 itsapplications.Surface energy and surface tension, angle of contact, excess of pressure across a curved surface, application ofsurface tension ideas to drops, bubbles and capillary rise.Heat, temperature, thermal expansion; thermal expansion of solids, liquids and gases, anomalous expansion ofwater; specific heat capacity; Cp, Cv - calorimetry; change of state - latent heat capacity.Heat transfer-conduction, convection and radiation, thermal conductivity, Qualitative ideas of Blackbody radiation,Wein’s displacement Law, Stefan’s law, Green house effect.Unit-VIII : Thermodynamics 12 PeriodsThermal equilibrium and definition of temperature (zeroth law of thermodynamics).Heat, work and internal energy.First law of thermodynamics. Isothermal and adiabatic processes.Second law of thermodynamics: reversible and irreversible processes. Heat engine and refrigerator.Unit-IX : Behaviour of Perfect Gases and Kinetic Theory of Gases 08 PeriodsEquation of state of a perfect gas, work done in compressing a gas.Kinetic theory of gases - assumptions, concept of pressure. Kinetic interpretation of temperature; rmsspeed of gas molecules; degrees of freedom, law of equi-partition of energy (statement only) and application tospecific heat capacities of gases; concept of mean free path, Avogadro’s number.Unit-X : Oscillations and Waves 26 PeriodsPeriodic motion - time period, frequency, displacement as a function of time. Periodic functions.Simple harmonic motion (S.H.M) and its equation; phase; oscillations of a spring-restoring force andforce constant; energy in S.H.M. Kinetic and potential energies; simple pendulum derivation of expression for itstime period.Free, forced and damped oscillations (qualitative ideas only), resonance.Wave motion. Transverse and longitudinal waves, speed of wave motion. Displacement relation for aprogressive wave. Principle of superposition of waves, reflection of waves, standing waves in stringsand organ pipes, fundamental mode and harmonics, Beats, Doppler effect.

PRACTICALS Total Periods : 60

The record, to be submitted by the students, at the time of their annual examination, has to include : Record of at least 15 Experiments [with a minimum of 8 from section A and 7 from section B], to be

performed by the students. Record of at least 5 Activities [with a minimum of 2 each from section A and section B], to be performed

by the students. Report of the project to be carried out by the students.

( vi )

EVALUATION SCHEME

Two experiments one from each section 8+8 MarksPractical record (experiment and activities) 6 MarksInvestigatory Project 3 MarksViva on experiments, activities and project 5 Marks

Total 30 Marks

SECTION–AExperiments(Any 8 experiments out of the following to be performed by the Students)1. To measure 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 diameter of a given wire and thickness of a given sheet using screw gauge.3. To determine volume of an irregular lamina using screw gauge.4. To determine 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 L-T and L-T2 graphs. Hence find the effective length of second’s pendulum using

appropriate graph.8. To study variation of time period of a simple pendulum by changing its length and taking bobs of different masses

independently and interpret the result.9. To study the relationship between force of limiting friction and normal reaction and to find the coefficient 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 ( ) by plotting graph between force and sin.Activities1. 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 & time.

SECTION–BExperiments(Any 7 experiments out of the following to be performed by the students)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 (i) solid, (ii) liquid, 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.Activities1. 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 presure with increase in velocity of a fluid.Prescribed Books :1. Physics Part-I, Textbook for Class XI, 2. Physics Part-II, Textbook for Class XI, Published by NCERT

( vii )

PHYSICS QUESTION PAPER DESIGN CLASS - XI (2014-15)

Time 3 Hours Max. Marks: 70S. Typology of Questions Very Short Short Value Long Total %

No. Short Answer-I Answer -II based Anser Marks Weigh-Answer (SA-I) (SA-II) question (L.A.) tage(VSA) (2 marks) (3 marks) (4 marks) (5 marks)

(1 mark)1 Remembering- 2 1 1 - - 7 10%

(Knowledge based Simplerecall questions, to knowspecific facts, terms,concepts, principles, ortheories, Identify, define,or recite, information)

2 Understanding- - 2 4 - 1 21 30%(Comprehension -to befamiliar with meaning andto understandconceptually, interpret,compare, contrast, explain,paraphrase information)

3 Application (Use abstract - 2 4 - 1 21 30%information in concretesituation, to applyknowledge to newsituations, Use givencontent to interpret asituation, provide anexample, or solve aproblem)

4 High Order Thinking 2 - 1 - 1 10 14%Skills ( Analysis &Synthesis- Classify,compare, contrast, ordifferentiate betweendifferent pieces ofinformation, Organizeand/or integrate uniquepieces of informationfrom a variety of sources)

5 Evaluation and Multi- 1 - 2 1 - 11 16%Disciplinary- (Appraise,judge, and/or justify thevalue or worth of a decisionor outcome, or to predictoutcomes based on values)

TOTAL 5x1=5 5x2=10 12x3=36 1x4=4 3x5=15 70(26) 100%

QUESTION WISE BREAK UP

Type of Question(s) Mark(s) per Total No. of TotalQuestion Questions Marks

VSA 1 5 05

SA-I 2 5 10

SA-II 3 12 36

VBQ 4 1 04

LA 5 3 15

Total 26 70

1. Internal Choice: There is no overall choice in the paper. However, there is an internal choice in one questionof 2 marks weightage, one question of 3 marks weightage and all the three questions of 5 marks weightage.

2. The above template is only a sample. Suitable internal variations may be made for generating similar templateskeeping the overall weightage to different form of questions and typology of questions same.

( viii )

Solved Paper (KVS), 2014 | 1

Time Allowed : 3 hours (Solved Paper) Maximum Marks : 70

General Instructions :

(i) All questions are compulsory.

(ii) There are 30 Questions in total. Questions 1 to 8 carry one mark each.

Question numbers 9 to 18 carry 2 marks each.

Question numbers 19 to 27 carry 3 marks each.

Question numbers 28 to 30 carry 5 marks each.

(iii) There is no overall choice. However an internal choice has been provided in one questionof 2 marks, one question of 3 marks and all three questions of 5 marks each, you have toattempt only one of the given choices in such questions.

(iv) Use of calculators is not permitted.

1. 1

2. A car and a truck are moving on a level road so that their linear momenta are equal. Which oneis moving faster ? 1

3. What is the contribution of Mr Homi Jehangir Bhabha in science ? 1

4. Why do we use a wrench of long arm to unscrew a nut tightly fitted to a bolt ? 1

5. What do you mean by resonance ? 1

6. The stress-strain graph for materials A and B are as shown in the graphs are drawn to the samescale. Which graph represents property of Ductile materials ? Justify your answer. 1

Fig.

7. Identify the types of motion whether it is one dimension, two dimension or three dimension.

(a) Kicking a football

(b) Motion of needle clock 1

8. When we try to close a water tap with our fingers, fast jets of water gush through the openingsbetween our fingers. Explain why ? 1

9. State perpendicular axis and parallel axis theorem of moment of inertia. 2

10. What do you mean by anomalous behaviour of water ? How it help make possible aquatic life inpolar region ? 2

11. A bullet of mass 0·04 kg moving with a speed of 90 ms-1 enters a heavy wooden block and isstopped after a distance of 60 cm. What is the average resistive force exerted by the block on thebullet ? 2

12. State work-energy theorem. The momentum of a body of mass 5 kg is 500 kg m/s. Find its kineticenergy. 2

Strain

Str

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Strain

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KENDRIYA VIDHYALAYA SANGATHANSESSION ENDING EXAMINATION 2013-14

SUBJECT : PHYSICS

Class-XI

Which type of energy is stored in the spring of wrist watch ?

cont inue

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

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