Complete Companion For Jee Main 2020 Physics Vol 1

641 Pages·2019·59.514 MB·English

by  Sanjeev Kumar

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FIFTH EDITION
Complete Companion for
2020
JEE Main
PHYSICS
(cid:31)(cid:30)(cid:29)(cid:28)(cid:27)(cid:26)(cid:25)(cid:24)
Sanjeev Kumar
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Copyright © 2019 Pearson India Education Services Pvt. Ltd

Published by Pearson India Education Services Pvt. Ltd, CIN: U72200TN2005PTC057128.

No part of this eBook may be used or reproduced in any manner whatsoever without the publisher’s
prior written consent.

This eBook may or may not include all assets that were part of the print version. The publisher
reserves the right to remove any material in this eBook at any time.

ISBN 978-93-534-3507-3
eISBN:

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Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix Brain Map 2.26
Physics Trend Analysis (2011 to 2019) . . . . . . . . . xi NCERT Exemplars 2.27
Practice Exercises 2.33
Chapter 1 Unit and Measurements 1.1
Chapter 3 Laws of Motion 3.1
Physical Quantities 1.1
Force 3.1
Dimensions 1.2
Free Body Diagram 3.3
Units 1.7
Newton’s Laws of Motion 3.4
Signifi cant Figures 1.11
Constrained Motion 3.9
Error Analysis in Measurements 1.13
Weighing Machine 3.12
Experiments 1.16
Spring Force 3.12
Basic Mathematics 1.19
Wedge Constraint 3.14
Use of Vector Analysis 1.28
Newton’s Law for a System 3.14
Scalars and Vectors 1.28
Newton’s Law for Non-Inertial Frame 3.15
Addition of Vectors 1.30
Friction 3.17
Subtraction of Vectors 1.32
Dynamics of Uniform Circular Motion 3.26
Resolution of Vectors 1.33
Brain Map 1 3.36
Addition of Vector by Analytical Method 1.35
Brain Map 2 3.37
Brain Map 1.41
NCERT Exemplars 3.38
NCERT Exemplars 1.42
Practice Exercises 3.43
Practice Exercises 1.45
Chapter 2 Motion in a Straight Line Chapter 4 Work, Energy and Power 4.1
and in a Plane 2.1 Work 4.1
Motion in Straight Line 2.1 Energy 4.5
Uniformly Accelerated Motion 2.3 Power 4.11
Directions of Vectors in Straight Line Motion 2.3 Potential Energy 4.13
Graphical Representation of Rectilinear Motion 2.8 Conservative Forces 4.15
Motion in Two Dimensions 2.14 Non-conservative Forces 4.16
Relative Motion 2.20 Potential Energy and Conservative Force 4.18
Circular Motion 2.23 Equilibrium of a Particle 4.20
Non-uniform Circular Motion with Mechanical Energy 4.20
Constant Angular Acceleration 2.23
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vi Contents
Brain Map 4.23 Chapter 8 Mechanical Properties
of Solids and Fluids 8.1
NCERT Exemplars 4.24
Practice Exercises 4.26 Elasticity 8.1
Hooke’s Law and Modulus of Elasticity 8.3
Chapter 5 Impulse and Momentum 5.1
Alternatives of SHM 8.8
Centre of Mass 5.1
Applications of Elasticity 8.9
Motion of Centre of Mass and
Viscosity 8.9
Conservation of Momentum 5.7
Stokes’ Law 8.12
Impulse 5.13
Surface Tension 8.13
Impulsive Force 5.14
Surface Energy 8.23
Collision or Impact 5.16
Fluid Mechanics 8.24
Brain Map 5.31
Pascal’s Law 8.25
Practice Exercises 5.32
Atmospheric Pressure 8.25
Chapter 6 System of Particles and
Archimedes’ Principle 8.29
Rotational Motion 6.1
Pressure in Case of Accelerating Fluid 8.32
Rigid Body 6.1
Streamline Flow 8.32
Moment of Inertia (I) About an Axis 6.3
Bernoulli’s Theorem 8.33
Radius of Gyration 6.11
Brain Map 1 8.38
Moment of inertia of Bodies with Cut 6.11
Brain Map 2 8.39
Torque 6.12
NCERT Exemplars 8.40
Equilibrium 6.17
Practice Exercises 8.44
Angular Momentum (L) 6.19
Chapter 9 Heat and Thermal Expansion 9.1
Combined Translational and Rotational
Motion of a Rigid Body 6.22 Heat 9.1
Toppling 6.31 Specific Heat 9.2
Brain Map 1 6.33 Calorimetry 9.3
Brain Map 2 6.34 Thermal Expansion 9.5
NCERT Exemplars 6.35 Linear Expansion 9.6
Practice Exercises 6.37 Specific Heat 9.6
Superficial or Areal Expansion 9.10
Chapter 7 Gravitation 7.1
Volume or Cubical Expansion 9.10
Newton’s Law of Gravitation 7.1
Relation Between a, b, and g 9.11
Gravitational Field 7.2
Variation of Density with Temperature 9.11
Gravitational Potential 7.7
Bimetallic Strip 9.13
Gravitational Potential energy 7.9
Applications of Thermal Expansion 9.14
Escape Speed 7.11
Temperature 9.14
Motion of a Satellite 7.12
Kinetic Theory of Gases 9.19
Geo-stationary Satellite 7.12
Maxwell’s Distribution Law 9.20
Weightlessness in a Satellite 7.13
Degree of Freedom 9.21
Kepler’s Laws 7.16
Maxwell’s Law of Equpartition of Energy 9.21
Brain Map 7.17
Indicator Diagram 9.22
NCERT Exemplars 7.18
Brain Map 9.22
Practice Exercises 7.20
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Contents vii
NCERT Exemplars 9.23 Perfectly Black Body and Black Body Radiation
(Ferry’s Black Body) 11.6
Practice Exercises 9.28
Absorption, Reflection, and
Chapter 10 Thermodynamics 10.1 Emission of Radiations 11.7
Thermodynamic System 10.1 Kirchoff’s Law 11.7
First Law of Thermodynamics 10.5 Nature of Thermal Radiations:
(Wien’s Displacement Law) 11.7
Free Expansion 10.9
Stefan-Boltzmann’s Law 11.8
Brain Map 10.12
Newton’s Law of Cooling 11.9
NCERT Exemplars 10.13
Brain Map 11.10
Practice Exercises 10.15
Practice Exercises 11.11
Chapter 11 Heat Transfer 11.1
Chapter 12 Oscillations and Waves 12.1
Introduction 11.1
Simple Harmonic Motion 12.1
Conduction 11.1
Wave on a String 12.15
Steady State 11.1
Sound Waves 12.28
Thermal Resistance to Conduction 11.2
Brain Map 1 12.42
Slabs in Parallel and Series 11.3
Brain Map 2 12.43
Convection 11.6
NCERT Exemplars 12.44
Radiation 11.6
Practice Exercises 12.49
Prevost Theory of Exchange 11.6
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Preface
About the Series
A Complete Resource Book for JEE Main series is a must have resource for students preparing for Joint Entrance
Examination. There are three subjective books—Physics, Chemistry, and Mathematics; the core objective of this series is to
strengthen the fundamental concepts and prepare students for various engineering entrance examinations. It provides class-
tested course material and numerical applications that will supplement any ready material available as student resource.
To ensure high level of accuracy and practicality, this series has been authored by highly qualifi ed and experienced
faculties for all three titles.
About the Book
Complete Companion for JEE Main 2020 Physics, Volume 1 particularly developed for class 11th students, so that they can
start their preparation from the early days. This title is designed as per the latest JEE Main syllabus, where the important
topics are covered in 12 chapters. It has been structured in user friendly approach such that each chapter begins with topic-
wise theory, followed by suffi cient solved examples and then practice questions along with previous years’ questions.
The chapter-end exercises are structured in line with JEE questions with ample of questions on single choice correct
question (SCQ) for extensive practice. Previous 18 years’ questions from JEE Main and AIEEE are also added in every
chapter. Hints and Solutions at the end of every chapter will help the students to evaluate their concepts and numerical
applications. Because of its comprehensive and in-depth approach, it will be especially helpful for those students who
prefers self-study than going for any classroom teaching.
Series Features
• Complete coverage of topics along with ample number of solved examples
• Large variety of practice problems with complete solutions
• Chapter-wise Previous 18 years’ AIEEE/JEE Main questions
• Fully solved JEE Main 2019 (Jan/Apr) questions added in opening section of the book
• Includes 5 Mock Tests papers based on JEE Main pattern in the book
• Free Online Mock Tests as per the recent JEE Main pattern
I dedicate this book to my family for their immense support and love. Special thanks to my parents for their support and
encouragement and to my wife Pallawi and my sons Haardik and Saarthak for sustaining me throughout this project.
I would like to express my heartfelt gratitude to the Pearson team, without them I would not have been able to bring out
this book.
Despite of our best eff orts, some errors may have crept into the book. Constructive comments and suggestions to
further improve the book are welcome and shall be acknowledged gratefully. For any suggestion and feedback please
contact us at [email protected]
Sanjeev Kumar
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