Topics
Rotational Dynamics
 Rotational Dynamics
 Circular Motion and Its Characteristics
 Applications of Uniform Circular Motion
 Vertical Circular Motion
 Moment of Inertia as an Analogous Quantity for Mass
 Radius of Gyration
 Theorems of Perpendicular and Parallel Axes
 Angular Momentum or Moment of Linear Momentum
 Expression for Torque in Terms of Moment of Inertia
 Conservation of Angular Momentum
 Rolling Motion
Circular Motion
 Angular Displacement
 Angular Velocity
 Angular Acceleration
 Angular Velocity and Its Relation with Linear Velocity
 Uniform Circular Motion
 Radial Acceleration
 Dynamics of Uniform Circular Motion  Centripetal Force
 Centrifugal Forces
 Banking of Roads
 Vertical Circular Motion Due to Earth’s Gravitation
 Equation for Velocity and Energy at Different Positions of Vertical Circular Motion
 Kinematical Equations for Circular Motion in Analogy with Linear Motion.
Gravitation
 Newton’s Law of Gravitation
 Projection of Satellite
 Periodic Time
 Kepler’s Laws
 Binding Energy and Escape Velocity of a Satellite
 Weightlessness
 Variation of ‘G’ Due to Lattitude and Motion
 Acceleration Due to Gravity and Its Variation with Altitude and Depth
 Communication satellite and its uses
 Composition of Two S.H.M.’S Having Same Period and Along Same Line
Mechanical Properties of Fluids
 Fluid and Its Properties
 Thrust and Pressure
 Liquid Pressure
 Pressure Exerted by a Liquid Column
 Atmospheric Pressure
 Gauge Pressure and Absolute Pressure
 Hydrostatic Paradox
 Transmission of Pressure in Liquids: Pascal’s Law
 Application of Pascal’s Law
 Measurement of Atmospheric Pressure
 Mercury Barometer (Simple Barometer)
 Open Tube Manometer
 Surface Tension
 Molecular Theory of Surface Tension
 Surface Tension and Surface Energy
 Angle of Contact
 Effect of Impurity and Temperature on Surface Tension
 Excess Pressure Across the Free Surface of a Liquid
 Explanation of Formation of Drops and Bubbles
 Capillarity and Capillary Action
 Fluids in Motion
 Critical Velocity and Reynolds Number
 Viscous Force Or Viscosity
 Stokes’ Law
 Terminal Velocity
 Equation of Continuity
 Bernoulli's Equation
 Applications of Bernoulli’s Equation
Angular Momentum
Kinetic Theory of Gases and Radiation
 Gases and Its Characteristics
 Classification of Gases: Real Gases and Ideal Gases
 Mean Free Path
 Pressure of Ideal Gas
 Root Mean Square (RMS) Speed
 Interpretation of Temperature in Kinetic Theory
 Law of Equipartition of Energy
 Specific Heat Capacity
 Absorption, Reflection, and Transmission of Heat Radiation
 Perfect Blackbody
 Emission of Heat Radiation
 Kirchhoff’s Law of Heat Radiation and Its Theoretical Proof
 Spectral Distribution of Blackbody Radiation
 Wien’s Displacement Law
 Stefanboltzmann Law of Radiation
Oscillations
 Periodic and Oscillatory Motions
 Simple Harmonic Motion (SHM)
 Differential Equation of Linear S.H.M.
 Projection of U.C.M.(Uniform Circular Motion) on Any Diameter
 Phase of K.E (Kinetic Energy)
 K.E.(Kinetic Energy) and P.E.(Potential Energy) in S.H.M.
 Composition of Two S.H.M.’S Having Same Period and Along Same Line
 Some Systems Executing Simple Harmonic Motion
Thermodynamics
Oscillations
 Oscillations
 Explanation of Periodic Motion
 Linear Simple Harmonic Motion (S.H.M.)
 Differential Equation of Linear S.H.M.
 Acceleration (a), Velocity (v) and Displacement (x) of S.H.M.
 Amplitude (A), Period (T) and Frequency (N) of S.H.M.
 Reference Circle Method
 Phase in S.H.M.
 Graphical Representation of S.H.M.
 Composition of Two S.H.M.’S Having Same Period and Along Same Line
 The Energy of a Particle Performing S.H.M.
 Simple Pendulum
 Angular S.H.M. and It's Differential Equation
 Damped Oscillations
 Free Oscillations, Forced Oscillations and Resonance Oscillations
 Periodic and Oscillatory Motions
Elasticity
Surface Tension
Superposition of Waves
Wave Motion
Wave Optics
Stationary Waves
Electrostatics
 Electrostatics
 Application of Gauss' Law
 Electric Potential and Potential Energy
 Electric Potential Due to a Point Charge, a Dipole and a System of Charges
 Equipotential Surfaces
 Electrical Energy of Two Point Charges and of a Dipole in an Electrostatic Field
 Conductors and Insulators, Free Charges and Bound Charges Inside a Conductor
 Dielectrics and Electric Polarisation
 Capacitors and Capacitance, Combination of Capacitors in Series and Parallel
 Displacement Current
 Energy Stored in a Capacitor
 Van De Graaff Generator
 Uniformly Charged Infinite Plane Sheet and Uniformly Charged Thin Spherical Shell (Field Inside and Outside)
Current Electricity
Kinetic Theory of Gases and Radiation
 Concept of an Ideal Gas
 Kinetic Theory of Gases Assumptions
 Mean Free Path
 Derivation for Pressure of a Gas
 Degrees of Freedom
 Derivation of Boyle’s Law
 Thermal Equilibrium
 First Law of Thermodynamics
 Heat Engines
 Heat and Temperature
 Qualitative Ideas of Blackbody Radiation
 Wein'S Displacement Law
 Green House Effect
 Stefan's Law
 Maxwell Distribution
 Specific Heat Capacities  Gases
 Law of Equipartition of Energy
Magnetic Fields Due to Electric Current
 Magnetic Fields Due to Electric Current
 Magnetic Force
 Cyclotron Motion
 Helical Motion
 Magnetic Force on a Wire Carrying a Current
 Force on a Closed Circuit in a Magnetic Field
 Torque on a Current Loop in Magnetic Field
 Magnetic Dipole Moment
 Magnetic Potential Energy of a Dipole
 Magnetic Field Due to a Current: Biotsavart Law
 Force of Attraction Between Two Long Parallel Wires
 Magnetic Field Produced by a Current in a Circular Arc of a Wire
 Axial Magnetic Field Produced by Current in a Circular Loop
 Magnetic Lines for a Current Loop
 Ampere's Law
 Magnetic Field of a Solenoid and a Toroid
Wave Theory of Light
Magnetic Materials
Interference and Diffraction
 Interference of Light
 Conditions for Producing Steady Interference Pattern
 Interference of Light Waves and Young’S Experiment
 Analytical Treatment of Interference Bands
 Measurement of Wavelength by Biprism Experiment
 Fraunhofer Diffraction Due to a Single Slit
 Rayleigh’s Criterion
 Resolving Power of a Microscope and Telescope
 Difference Between Interference and Diffraction
Electromagnetic Induction
 Electromagnetic Induction
 Faraday's Laws of Electromagnetic Induction
 Lenz's Law
 Flux of the Field
 Motional Electromotive Force
 Induced Emf in a Stationary Coil in a Changing Magnetic Field
 Generators
 Back Emf and Back Torque
 Induction and Energy Transfer
 Eddy Currents
 SelfInductance
 Energy Stored in a Magnetic Field
 Energy Density of a Magnetic Field
 Mutual Inductance
 Transformers
Electrostatics
 Applications of Gauss’s Law
 Mechanical Force on Unit Area of a Charged Conductor
 Energy Density of a Medium
 Dielectrics and Polarisation
 Concept of Condenser
 The Parallel Plate Capacitor
 Capacity of Parallel Plate Condenser
 Effect of Dielectric on Capacity
 Energy of Charged Condenser
 Condensers in Series and Parallel,
 VandeGraaff Generator
AC Circuits
Current Electricity
Dual Nature of Radiation and Matter
Magnetic Effects of Electric Current
Structure of Atoms and Nuclei
Magnetism
Semiconductor Devices
Electromagnetic Inductions
 Electromagnetic Induction
 Faraday’s Law of Induction
 SelfInductance
 Mutual Inductance
 Transformers
 Need for Displacement Current
 Coil Rotating in Uniform Magnetic Induction
 Alternating Currents
 Reactance and Impedance
 LC Oscillations
 Inductance and Capacitance
 Resonant Circuit
 Power in Ac Circuit: the Power Factor
 Lenz’S Law and Conservation of Energy
Electrons and Photons
Atoms, Molecules and Nuclei
 Alphaparticle Scattering and Rutherford’S Nuclear Model of Atom
 Bohr’s Model for Hydrogen Atom
 Hydrogen Spectrum
 Atomic Masses and Composition of Nucleus
 Introduction of Radioactivity
 Law of Radioactive Decay
 MassEnergy Relation and Mass Defect
 Nuclear Binding Energy
 Nuclear Fusion – Energy Generation in Stars
 deBroglie Relation
 Wave Nature of Matter
 Wavelength of an Electron
 DavissonGermer Experiment
 Continuous and Characteristics Xrays
Semiconductors
 Energy Bands in Solids
 Extrinsic Semiconductor
 Applications of Ntype and Ptype Semiconductors
 Special Purpose Pn Junction Diodes
 Semiconductor Diode
 Zener Diode as a Voltage Regulator
 IV Characteristics of Led
 Transistor and Characteristics of a Transistor
 Transistor as an Amplifier (Ceconfiguration)
 Transistor as a Switch
 Oscillators
 Digital Electronics and Logic Gates
Communication Systems
 Elements of a Communication System
 Basic Terminology Used in Electronic Communication Systems
 Bandwidth of Signals
 Bandwidth of Transmission Medium
 Need for Modulation and Demodulation
 Production and Detection of an Amplitude Modulated Wave
 Space Communication
 Propagation of Electromagnetic Waves
 Modulation and Its Necessity
notes
Theorem of perpendicular axis:
Perpendicular Axis Theorem: The moment of inertia of a planar body (lamina) about an axis perpendicular to its plane is equal to the sum of its moments of inertia about two perpendicular axes concurrent with perpendicular axis and lying in the plane of the body.
Moment of inertia about xaxis, I_{x }= mx^{2}
Moment of inertia about yaxis, I_{y }= my^{2}
Moment of inertia about zaxis, `"I"_z= m(sqrt(x2+y2))^2`
`I_x + I_y = mx^2 + my^2`
= `m(x^2 + y^2)`
=`m(sqrt(x2+y2))`
Ix+Iy=Iz
Hence the theorem is proved
Applicable only to planar bodies.
Theorem of parallel axis:
Parallel Axis Theorem: The moment of inertia of a body about any axis is equal to the sum of the moment of inertia of the body about a parallel axis passing through its centre of mass and the product of its mass and the square of the distance between the two parallel axes.
This theorem is applicable to a body of any shape.
Example: Given the moment of inertia of a disc of mass M and radius R about any of its diameters to be `"MR"^2/4`, find its moment of inertia about an axis normal to the disc and passing through a point on its edge
Solution:
We can apply Perpendicular axis theorem here on x axis & y axis and get I’, moment of inertia in z axis.
`"l"_"z" = "l"_"x" + "l"_"y"`, now as because of symmetry I_{x} & I_{y} are same so I_{z} = I’ = 2I = `("Mr"^2)/2`
Now we can apply parallel axis theorem to find I’’.
`I'' = I' + "MR"^2 = 3/2("MR"^2)`
Moment of Inertia:
Z 
Body 
Axis 
Figure 
I 
1 
Thin circular ring, radius R 
Perpendicular to plane, at centre 
MR^{2} 

2 
Thin circular ring, radius R 
Diameter 
`"MR"^2/2` 

3 
Thin rod, length L 
Perpendicular to rod, at mid point 
`"ML"^2/12` 

4 
Circular disc, radius R 
Perpendicular to disc at centre 
`"MR"^2/2` 

5 
Circular disc, radius R 
Diameter 
`"MR"^2/4` 

6 
Hollow cylinder, radius R 
Axis of cylinder 
MR^{2} 

7 
Solid cylinder, radius R 
Axis of cylinder 
`"MR"^2/2` 

8 
Solid sphere, radius R 
Diameter 
2 `"MR"^2/5` 
description
 Theorem of Parallel Axes
 Theorem of Perpendicular Axes