TopicLamp Review Team

The TopicLamp Review Team checks topic notes for accuracy, clarity and alignment with the NCERT syllabus. The review process includes checking calculations, source references and explanations. Each topic page identifies the team or reviewer credited with its checks. Readers can report a mistake using the link on any topic page.

Checked (715)

Physics: Units and Measurement

SI units Significant figures Errors in measurement Least count: vernier callipers and screw gauge Dimensions of physical quantities Dimensional formulae and equations Dimensional analysis

Physics: Motion in a Straight Line

Frame of reference and displacement Velocity and speed Acceleration Equations of motion Relative velocity

Physics: Motion in a Plane

Scalars and vectors Multiplying a vector by a number Adding vectors graphically Resolution of vectors Adding vectors by components Position, velocity and acceleration in a plane Constant acceleration in a plane Projectile motion Uniform circular motion

Physics: Laws of Motion

Aristotle’s fallacy Law of inertia Newton’s first law Newton’s second law Newton’s third law Conservation of momentum Equilibrium of a particle Friction Dynamics of circular motion Solving problems in mechanics

Physics: Work, Energy and Power

Scalar product Work-energy theorem Work Kinetic energy Work done by a variable force Work-energy theorem (variable force) Potential energy Conservation of mechanical energy Potential energy of a spring Power Collisions

Physics: Systems of Particles and Rotational Motion

Rigid body motion Centre of mass Motion of the centre of mass Momentum of a system Vector product Angular velocity Torque and angular momentum Equilibrium of a rigid body Experiment: mass with a metre scale Moment of inertia Parallel and perpendicular axes Rotational kinematics Rotational dynamics Angular momentum about an axis

Physics: Gravitation

Kepler’s laws Universal law of gravitation Gravitational constant Acceleration due to gravity Variation of g Gravitational potential energy Escape speed Earth satellites Energy of an orbiting satellite

Physics: Mechanical Properties of Solids

Elasticity and plasticity Stress and strain Hooke’s law Stress-strain curve Elastic moduli Experiment: Young’s modulus of a wire Applications of elastic behaviour

Physics: Mechanical Properties of Fluids

Pressure in fluids Streamline and turbulent flow Bernoulli’s principle Viscosity Experiment: viscosity from terminal velocity Surface tension Experiment: surface tension by capillary rise

Physics: Thermal Properties of Matter

Temperature and heat Measuring temperature Ideal-gas equation and absolute temperature Thermal expansion Specific heat capacity Calorimetry Experiment: specific heat by the method of mixtures Change of state Heat transfer Newton’s law of cooling

Physics: Thermodynamics

Thermal equilibrium Zeroth law of thermodynamics Heat, internal energy and work First law of thermodynamics Specific heat capacity of solids, water and gases State variables and equation of state Thermodynamic processes Second law of thermodynamics Reversible and irreversible processes Carnot engine

Physics: Kinetic Theory

Molecular nature of matter Behaviour of gases Kinetic theory of an ideal gas Law of equipartition of energy Specific heat capacity from kinetic theory Mean free path

Physics: Oscillations

Periodic and oscillatory motion Simple harmonic motion SHM and uniform circular motion Velocity and acceleration in SHM Force law for SHM Energy in SHM The simple pendulum Experiment: simple pendulum and loss of energy

Physics: Waves

Wave motion Transverse and longitudinal waves Displacement relation for a progressive wave Speed of a travelling wave Principle of superposition of waves Reflection of waves and standing waves Experiment: speed of sound with a resonance tube Beats

Physics: Electric Charges and Fields

Electric charge Conductors and insulators Basic properties of electric charge Coulomb’s law Forces between multiple charges Electric field Electric field lines Electric flux Electric dipole Dipole in a uniform field Continuous charge distribution Gauss’s law Applications of Gauss’s law

Physics: Electrostatic Potential and Capacitance

Electrostatic potential energy Electrostatic potential Potential due to a point charge Potential due to a dipole Potential due to a system of charges Equipotential surfaces Potential energy of a system of charges Potential energy in an external field Electrostatics of conductors Dielectrics and polarisation Capacitors and capacitance The parallel plate capacitor Effect of a dielectric on capacitance Combination of capacitors Energy stored in a capacitor

Physics: Current Electricity

Electric current Electric currents in conductors Ohm’s law Experiment: resistance using Ohm’s law Drift of electrons Limitations of Ohm’s law Resistivity of various materials Temperature dependence of resistivity Electrical energy and power Combination of resistors Cells, emf and internal resistance Cells in series and in parallel Kirchhoff’s rules Wheatstone bridge Metre bridge

Physics: Moving Charges and Magnetism

Magnetic force Motion in a magnetic field Biot–Savart law Field on the axis of a loop Ampere’s circuital law The solenoid Force between parallel currents Torque on a current loop Moving coil galvanometer Experiment: galvanometer resistance

Physics: Magnetism and Matter

The bar magnet Gauss’s law for magnetism Magnetisation and magnetic intensity Magnetic properties of materials

Physics: Electromagnetic Induction

Experiments of Faraday and Henry Magnetic flux Faraday’s law of induction Lenz’s law Motional emf Eddy currents Inductance AC generator

Physics: Alternating Current

AC voltage applied to a resistor Phasors AC voltage applied to an inductor AC voltage applied to a capacitor Series LCR circuit Power in ac circuits Transformers

Physics: Electromagnetic Waves

Displacement current Electromagnetic waves Electromagnetic spectrum

Physics: Ray Optics and Optical Instruments

Spherical mirrors Refraction Experiment: glass slab Total internal reflection Lenses Experiment: focal lengths Prism Experiment: prism i–δ graph Optical instruments

Physics: Wave Optics

Huygens principle Refraction and reflection by Huygens principle Coherent and incoherent addition Young’s double-slit experiment Diffraction Polarisation Brewster’s law

Physics: Dual Nature of Radiation and Matter

Electron emission Photoelectric effect Experimental study of the photoelectric effect Photoelectric effect and the wave theory Einstein’s photoelectric equation Photon Wave nature of matter

Physics: Atoms

Rutherford’s nuclear model Atomic spectra Bohr model Line spectra of hydrogen De Broglie and Bohr’s postulate

Physics: Nuclei

Composition of the nucleus Size of the nucleus Binding energy Nuclear force Radioactivity Nuclear energy

Physics: Semiconductor Electronics: Materials, Devices and Simple Circuits

Metals, insulators and semiconductors Intrinsic semiconductor Extrinsic semiconductor p-n junction Semiconductor diode Junction diode as a rectifier Zener diode LED, photodiode and solar cell Experiment: identifying components Logic gates

Chemistry: Some Basic Concepts of Chemistry

Importance of chemistry Nature of matter Properties of matter Uncertainty in measurement Laws of chemical combination Dalton’s atomic theory Atomic and molecular masses Mole concept Percentage composition Stoichiometry

Chemistry: Structure of Atom

Sub-atomic particles Atomic models Developments leading to Bohr’s model Bohr’s model Towards the quantum mechanical model Quantum mechanical model

Chemistry: Classification of Elements and Periodicity in Properties

Why classify elements? Genesis of periodic classification Modern periodic law Naming elements above 100 Configurations and the periodic table s, p, d and f blocks Periodic trends

Chemistry: Chemical Bonding and Molecular Structure

Kössel–Lewis approach Ionic bond Bond parameters VSEPR theory Valence bond theory Hybridisation Molecular orbital theory Homonuclear diatomic molecules Hydrogen bonding Metallic bonding

Chemistry: Thermodynamics

Thermodynamic terms Work, enthalpy and heat capacity Calorimetry Reaction enthalpy and Hess’s law Combustion, bond and lattice enthalpies Enthalpy of neutralization Experiment: enthalpy of solution of copper sulphate Spontaneity, entropy and Gibbs energy Gibbs energy and equilibrium

Chemistry: Equilibrium

Equilibrium in physical processes Dynamic equilibrium in chemical processes Law of chemical equilibrium and equilibrium constant Homogeneous equilibria Heterogeneous equilibria Applications of equilibrium constants Equilibrium constant, reaction quotient and Gibbs energy Factors affecting equilibria Ionic equilibrium in solution Acids, bases and salts Ionization of acids and bases Experiment: acid-base titration with an indicator Buffer solutions Solubility equilibria of sparingly soluble salts

Chemistry: Redox Reactions

Classical idea of oxidation and reduction Redox reactions as electron transfer Oxidation number Redox reactions and electrode processes

Chemistry: Organic Chemistry: Some Basic Principles and Techniques

General introduction to organic chemistry Tetravalence of carbon and shapes Structural representations Classification of organic compounds IUPAC nomenclature of organic compounds Isomerism Organic reaction mechanism Purification of organic compounds Qualitative analysis of organic compounds Quantitative analysis

Chemistry: Hydrocarbons

Classification of hydrocarbons Alkanes Alkenes Alkynes Aromatic hydrocarbons Carcinogenicity and toxicity

Chemistry: Solutions

Types of solutions Concentration of solutions Solubility Vapour pressure of solutions Ideal and non-ideal solutions Colligative properties Abnormal molar masses

Chemistry: Electrochemistry

Electrochemical cells Galvanic cells Nernst equation Conductance of electrolytic solutions Electrolytic cells and electrolysis Batteries Fuel cells Corrosion

Chemistry: Chemical Kinetics

Rate of a chemical reaction Factors influencing rate Experiment: iodide and hydrogen peroxide Integrated rate equations Temperature dependence of rate Collision theory

Chemistry: The p-Block Elements

Group 13 elements Group 14 elements Group 15 elements Group 16 elements Group 17 elements Group 18 elements

Chemistry: The d- and f-Block Elements

Position in the periodic table Electronic configurations Occurrence General properties Important compounds Experiment: KMnO₄ titrations Lanthanoids Actinoids Applications

Chemistry: Coordination Compounds

Werner’s theory Experiment: double salts Ligands and other terms Nomenclature Isomerism Bonding: VBT and CFT Metal carbonyls Importance and applications

Chemistry: Haloalkanes and Haloarenes

Classification Nomenclature Nature of C–X bond Preparation of haloalkanes Preparation of haloarenes Physical properties Chemical reactions Polyhalogen compounds

Chemistry: Alcohols, Phenols and Ethers

Classification Nomenclature Structures of functional groups Alcohols and phenols Experiment: tests for –OH groups Commercially important alcohols Ethers

Chemistry: Aldehydes, Ketones and Carboxylic Acids

Carbonyl group: names and structure Preparation of aldehydes and ketones Physical properties of aldehydes and ketones Reactions of aldehydes and ketones Experiment: tests for aldehydes and ketones Experiment: preparation of iodoform Uses of aldehydes and ketones Carboxyl group: names and structure Preparation of carboxylic acids Physical properties of carboxylic acids Chemical reactions of carboxylic acids Experiment: tests for the carboxyl group Uses of carboxylic acids

Chemistry: Amines

Structure of amines Classification of amines Nomenclature of amines Preparation of amines Physical properties of amines Chemical reactions of amines Experiment: tests for the amino group Experiment: preparation of acetanilide and p-nitroacetanilide Preparation of diazonium salts Physical properties of diazonium salts Chemical reactions of diazonium salts Experiment: preparation of aniline yellow Diazonium salts in the synthesis of aromatic compounds

Chemistry: Biomolecules

Carbohydrates Proteins Enzymes Vitamins Nucleic acids Hormones

Chemistry: Practical Chemistry

Experiment: preparation of lyophilic and lyophobic sols Experiment: salt analysis, anions Experiment: salt analysis, cations

Mathematics: Sets

Sets and their representations The empty set Finite and infinite sets Equal sets Subsets Power set Universal set Venn diagrams Operations on sets Complement of a set

Mathematics: Relations and Functions

Cartesian product Relations Functions

Mathematics: Trigonometric Functions

Angles Trigonometric functions Sum and difference formulas

Mathematics: Complex Numbers and Quadratic Equations

Complex numbers Algebra of complex numbers Modulus and conjugate The Argand plane Argument and polar form Quadratic equations

Mathematics: Linear Inequalities

Inequalities Solving linear inequalities

Mathematics: Permutations and Combinations

Fundamental principle of counting Permutations Combinations

Mathematics: Binomial Theorem

Binomial theorem General and middle terms

Mathematics: Sequences and Series

Sequences Series Arithmetic progression Geometric progression A.M. and G.M.

Mathematics: Straight Lines

Coordinate geometry basics Locus Slope of a line Forms of the equation of a line Distance of a point from a line Intersection of lines and triangle centres

Mathematics: Conic Sections

Sections of a cone Circle Circle: diameter form and a line Parabola Ellipse Hyperbola

Mathematics: Introduction to Three Dimensional Geometry

Coordinate axes and planes Coordinates of a point in space Distance between two points Section formula in 3D

Mathematics: Limits and Derivatives

Intuitive idea of derivatives Limits Limits of trigonometric functions Derivatives

Mathematics: Statistics

Mean, median and mode Mode Measures of dispersion Range Mean deviation Variance and SD

Mathematics: Probability

Events Axiomatic probability

Mathematics: Relations and Functions (Class 12)

Types of relations Types of functions Composition and inverse

Mathematics: Inverse Trigonometric Functions

Principal value branches Properties

Mathematics: Matrices

Matrix and order Types of matrices Operations on matrices Transpose of a matrix Symmetric and skew symmetric Invertible matrices

Mathematics: Determinants

Determinant Area of a triangle Minors and cofactors Adjoint and inverse Solving linear systems

Mathematics: Continuity and Differentiability

Continuity Differentiability Exponential and log functions Logarithmic differentiation Parametric derivatives Second order derivative

Mathematics: Application of Derivatives

Rate of change Increasing and decreasing Maxima and minima

Mathematics: Integrals

Anti derivatives Substitution and identities Particular integrals Partial fractions Integration by parts Definite integral Fundamental theorem Substitution with limits Properties of definite integrals

Mathematics: Application of Integrals

Area under curves Area between curves

Mathematics: Differential Equations

Order and degree General and particular solutions Solving first order equations

Mathematics: Vector Algebra

Vectors: basic concepts Types of vectors Addition of vectors Scalar multiple and components Dot and cross products

Mathematics: Three Dimensional Geometry

Direction cosines and ratios Equation of a line in space Angle between two lines Shortest distance between lines Line of shortest distance

Mathematics: Linear Programming

Linear programming problems

Mathematics: Probability (Class 12)

Conditional probability Multiplication theorem Independent events Bayes’ theorem Probability distribution

Biology: The Living World

What is living? Diversity in the living world Taxonomic categories

Biology: Biological Classification

Five kingdom classification Kingdom Monera Kingdom Protista Kingdom Fungi Kingdom Plantae Kingdom Animalia Viruses, viroids, prions and lichens

Biology: Plant Kingdom

Algae Bryophytes Pteridophytes Gymnosperms Angiosperms

Biology: Animal Kingdom

Basis of classification Classification of animals

Biology: Morphology of Flowering Plants

The root Modifications of root The stem Modifications of stem The leaf Modifications of leaf Inflorescence The flower The fruit The seed Semi-technical description Family Solanaceae Family Malvaceae Family Cruciferae Family Leguminosae Family Compositae Family Gramineae

Biology: Anatomy of Flowering Plants

Plant tissues Tissue systems Dicot and monocot anatomy

Biology: Structural Organisation in Animals

Animal tissues Organs and organ systems Frog

Biology: Cell: The Unit of Life

What is a cell? Cell theory Overview of the cell Prokaryotic cells Eukaryotic cells

Biology: Biomolecules

Chemical composition Primary and secondary metabolites Biomacromolecules Proteins Polysaccharides Nucleic acids Structure of proteins Enzymes

Biology: Cell Cycle and Cell Division

Cell cycle Mitosis (M phase) Significance of mitosis Meiosis Significance of meiosis

Biology: Photosynthesis in Higher Plants

What photosynthesis needs Early experiments Site of photosynthesis Photosynthetic pigments Light reaction Electron transport Calvin cycle C₄ pathway Photorespiration Factors affecting photosynthesis

Biology: Respiration in Plants

Do plants breathe? Glycolysis Fermentation Aerobic respiration The respiratory balance sheet Amphibolic pathway Respiratory quotient

Biology: Plant Growth and Development

Seed germination Growth Differentiation, dedifferentiation and redifferentiation Development Plant growth regulators

Biology: Breathing and Exchange of Gases

Respiratory organs Mechanism of breathing Exchange of gases Transport of gases Regulation of respiration Disorders of respiratory system

Biology: Body Fluids and Circulation

Blood Lymph (tissue fluid) Circulatory pathways Double circulation Regulation of cardiac activity Disorders of the circulatory system

Biology: Excretory Products and Their Elimination

Modes of excretion Human excretory system Urine formation Functions of the tubules Counter current mechanism Regulation of kidney function Micturition Other organs in excretion Disorders of the excretory system

Biology: Locomotion and Movement

Types of movement Muscle and muscle contraction Skeletal system Joints Disorders of muscles and bones

Biology: Neural Control and Coordination

Neural system and coordination Human neural system Neuron and the nerve impulse Central neural system: the brain

Biology: Chemical Coordination and Integration

Endocrine glands and hormones Human endocrine system Hormones of heart, kidney and gut Mechanism of hormone action

Biology: Sexual Reproduction in Flowering Plants

Flower: a fascinating organ Pre-fertilisation: structures and events Double fertilisation Post-fertilisation: structures and events Apomixis and polyembryony

Biology: Human Reproduction

The male reproductive system The female reproductive system Gametogenesis Menstrual cycle Fertilisation and implantation Pregnancy and embryonic development Parturition and lactation

Biology: Reproductive Health

Reproductive health: problems and strategies Population stabilisation and birth control Medical termination of pregnancy (MTP) Sexually transmitted infections (STIs) Infertility and assisted reproduction

Biology: Principles of Inheritance and Variation

Mendel’s experiments Inheritance of one gene Inheritance of two genes Polygenic inheritance Pleiotropy Sex determination Mutation Genetic disorders

Biology: Molecular Basis of Inheritance

DNA: structure and packaging Search for genetic material RNA world DNA replication Transcription Genetic code Translation Regulation of gene expression Human Genome Project DNA fingerprinting

Biology: Evolution

Origin of life Evolution of life forms Evidences for evolution Adaptive radiation Biological evolution Mechanism of evolution Hardy–Weinberg principle Modern synthetic theory A brief account of evolution Origin and evolution of man

Biology: Human Health and Disease

Health and disease Common diseases in humans Dengue and chikungunya Immunity HIV and AIDS Cancer Drug, alcohol and tobacco abuse

Biology: Microbes in Human Welfare

Microbes in household products Microbes in industrial products Microbes in sewage treatment Microbes in biogas production Microbes as biocontrol agents Microbes as biofertilisers

Biology: Biotechnology: Principles and Processes

Principles of biotechnology Tools of recombinant DNA technology Processes of recombinant DNA technology

Biology: Biotechnology and Its Applications

Biotechnology in agriculture Biotechnology in medicine Transgenic animals Ethical issues

Biology: Organisms and Populations

Populations

Biology: Ecosystem

Structure and function Productivity Decomposition Energy flow Ecological pyramids

Biology: Biodiversity and Conservation

Biodiversity Biodiversity conservation Red Data Book

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