Contents

• Foreword V
• Preface XI

CHAPTER ONE

ELECTRIC CHARGES AND FIELDS

• 1.1 Introduction 1
• 1.2 Electric Charge 1
• 1.3 Conductors and Insulators 5
• 1.4 Charging by Induction 6
• 1.5 Basic Properties of Electric Charge 8
• 1.6 Coulomb’s Law 10
• 1.7 Forces between Multiple Charges 15
• 1.8 Electric Field 18
• 1.9 Electric Field Lines 23
• 1.10 Electric Flux 25
• 1.11 Electric Dipole 27
• 1.12 Dipole in a Uniform External Field 31
• 1.13 Continuous Charge Distribution 32
• 1.14 Gauss’s Law 33
• 1.15 Applications of Gauss’s Law 37

CHAPTER TWO

ELECTROSTATIC POTENTIAL AND CAPACITANCE

• 2.1 Introduction 51
• 2.2 Electrostatic Potential 53
• 2.3 Potential due to a Point Charge 54
• 2.4 Potential due to an Electric Dipole 55
• 2.5 Potential due to a System of Charges 57
• 2.6 Equipotential Surfaces 60
• 2.7 Potential Energy of a System of Charges 61
• 2.8 Potential Energy in an External Field 64
• 2.9 Electrostatics of Conductors 67
• 2.10 Dielectrics and Polarisation 71
• 2.11 Capacitors and Capacitance 73
• 2.12 The Parallel Plate Capacitor 74
• 2.13 Effect of Dielectric on Capacitance 75
• 2.14 Combination of Capacitors 78
• 2.15 Energy Stored in a Capacitor 80

CHAPTER THREE

CURRENT ELECTRICITY

• 3.1 Introduction 93
• 3.2 Electric Current 93
• 3.3 Electric Currents in Conductors 94
• 3.4 Ohm’s law 95
• 3.5 Drift of Electrons and the Origin of Resistivity 97
• 3.6 Limitations of Ohm’s Law 101
• 3.7 Resistivity of Various Materials 101
• 3.8 Temperature Dependence of Resistivity 103
• 3.9 Electrical Energy, Power 105
• 3.10 Combination of Resistors — Series and Parallel 107
• 3.11 Cells, emf, Internal Resistance 110
• 3.12 Cells in Series and in Parallel 113
• 3.13 Kirchhoff’s Rules 115
• 3.14 Wheatstone Bridge 118
• 3.15 Meter Bridge 120
• 3.16 Potentiometer 122

CHAPTER FOUR

MOVING CHARGES AND MAGNETISM

• 4.1 Introduction 132
• 4.2 Magnetic Force 133
• 4.3 Motion in a Magnetic Field 137
• 4.4 Motion in Combined Electric and Magnetic Fields 140
• 4.5 Magnetic Field due to a Current Element, Biot-Savart Law 143
• 4.6 Magnetic Field on the Axis of a Circular Current Loop 145
• 4.7 Ampere’s Circuital Law 147
• 4.8 The Solenoid and the Toroid 150
• 4.9 Force between Two Parallel Currents, the Ampere 154
• 4.10 Torque on Current Loop, Magnetic Dipole 157
• 4.11 The Moving Coil Galvanometer 163

CHAPTER FIVE

MAGNETISM AND MATTER

• 5.1 Introduction 173
• 5.2 The Bar Magnet 174
• 5.3 Magnetism and Gauss’s Law 181
• 5.4 The Earth’s Magnetism 185
• 5.5 Magnetisation and Magnetic Intensity 189
• 5.6 Magnetic Properties of Materials 191
• 5.7 Permanent Magnets and Electromagnets 195

CHAPTER SIX

ELECTROMAGNETIC INDUCTION

• 6.1 Introduction 204
• 6.2 The Experiments of Faraday and Henry 205
• 6.3 Magnetic Flux 206
• 6.4 Faraday’s Law of Induction 207
• 6.5 Lenz’s Law and Conservation of Energy 210
• 6.6 Motional Electromotive Force 212
• 6.7 Energy Consideration: A Quantitative Study 215
• 6.8 Eddy Currents 218
• 6.9 Inductance 219
• 6.10 AC Generator 224

CHAPTER SEVEN

ALTERNATING CURRENT

• 7.1 Introduction 233
• 7.2 AC Voltage Applied to a Resistor 234
• 7.3 Representation of AC Current and Voltage by Rotating Vectors — Phasors 237
• 7.4 AC Voltage Applied to an Inductor 237
• 7.5 AC Voltage Applied to a Capacitor 241
• 7.6 AC Voltage Applied to a Series LCR Circuit 244
• 7.7 Power in AC Circuit: The Power Factor 252
• 7.8 LC Oscillations 255
• 7.9 Transformers 259

CHAPTER EIGHT

ELECTROMAGNETIC WAVES

• 8.1 Introduction 269
• 8.2 Displacement Current 270
• 8.3 Electromagnetic Waves 274
• 8.4 Electromagnetic Spectrum 280

ANSWERS 288

Courtesy: ncert.nic.in

Go Back To NCERT Books Main Page