about
Units
System of Units
S.I. Units
Conversion of Units
S.I. Prefixes and Multiplication Factors
Quantities and Units
Fractions
Fractions
Least Common Multiple (L.C.M.)
Highest Common Factor (H.C.F.)
Conversion of Fraction to Decimal and Vice versa
Scientific Calculation
Square Roots
Square Root
Rationalisation
Simple Calculator
Ratio and Proportion
Ratio
Proportion
Time, Work and Labour Related Problem
Average
Percentage
Convert fractional Number into Percentage
Convert Percentage into Decimal
Convert Decimal into Percentage
Simple Calculation
Metals
Properties of Metals
Iron
Types of Metals
Differences between Ferrous and Non-ferrous Metals
Non-ferrous Alloys
Mass, Weight and Density
Mass
Weight
Differences between Mass and Weight
Density
Relative Density
Laws of Floatation
Velocity and Speed
Rest and Motion
Speed
Velocity
Differences between Velocity and Speed
Acceleration
Retardation
Newton's Laws of Motion
Equations of Motion
Work, Power and Energy
Work
Power
Horse Power of Engines
Mechanical Efficiency
Energy
Algebra
Rules of Positive and Negative Signs
Laws of Indices
Addition and Subtraction of Algebraic Number
Multiplication and Division of Algebraic Numbers
Algebraic Formulas
Factors of Trinomial
Equations
Quadratic Equations
Mensuration
Circle
Perimeter and Area of Plane Figures
Volume
Area and Volume of Spherical Figures
Area of Solids of Revolution
Trigonometry
Relation between Sides of Triangle
Trigonometric Formulae
Relation between Trigonometric Ratios
Systems of Measuring Angles
Trigonometric Values of Some Angles
Heat and Temperature
Heat
Temperature
Boiling Point
Melting Point
Differences between Temperature and Heat
Sources of Heat
Effects of Heat
Specific Heat
Quantity of Heat
Thermal Capacity
Water Equivalent of Heat
Interchange of Heat
Calorimeter
Transmission of Heat
Thermometer
Pyrometer
Expansion of Solids
Electricity
Production of Electricity
Uses of Electricity
Types of Electrical Materials According to the Electricity Law
Electric Current
Types of Electric Current
Comparison between A.C. and D.C.
Ampere
Electromotive Force
Electric Voltage
Potential Difference (P.D.)
One Volt
Resistance
Specific Resistance
Temperature Coefficient
Electric Circuit
Series and Parallel Connections of Resistance
Electrical Power
Electrical energy
Simple Machines and Levers
Effort
Load
Mechanical Advantage
Velocity Ratio
Efficiency of Machine
Types of Simple Machines
Lever
Elasticity
Elasticity
Plasticity
Stress
Strain
Different Types of stresses
Hooke’s Law
Elastic Limit
Ultimate Stress
Working Stress
Factor of Safety
Stress-strain Curve
Young’s Modulus/Modulus of Elasticity
Modulus of Rigidity
Poisson’s Ratio
Bulk Modulus
Relationship between Modulus for a Given Material
Materials
Classification of Materials
Classification of Electrical Materials
Differences between Conductor, Insulator and Semiconductor
Properties of Materials
Magnetism
Magnetism and Magnet
Types of Magnet
Classification of Magnetic Substances
Laws of Magnetism
Magnetic Field
Important Definitions Related to Magnetism
Determination of Direction of Magnetic Field of Current Carrying Conductor
Magnetic Effect of Current in Two Parallel Conductors
Solenoid
Electromagnet
Determination of Force in Current Carrying Conductor
Faraday’s Laws of Electromagnetic Induction
Applications of Electromagnet
Lifting Power of Magnet
Pressure
Units of Pressure
Pneumatic Pressure
Atmospheric Pressure
Pressure on Body Immersed in a Fluid
Types of Pressure
Device for Measuring Atmospheric Pressure
Boyle’s Law
Charles’ Law
Gas Equation
Pascal’s Law
Heat Treatment
Critical Temperature
Three Stages of Heat Treatment
Methods of Heat Treatment
Law of Indices
Square
Power
Square Root
Methods of Solving out the Square Root
Cube
Cube Root
Method of Finding Cube Root
Rationalization
Alternating Current Circuit
Alternating Current
Terms Related to Alternating Current
Speed of Wave
Pure Resistive Circuit
Inductor
Inductance
Inductive Reactance
Coefficient of Coupling
Time Constant of an Inductor
Capacitance
Capacitive Reactance
Time Constant of a Capacitor
Impedance
Resonance Frequency
Circuit Q Factor
Polyphase
Combination of Resistors
Series and Parallel Combination of Capacitor
Series and Parallel Combination of Inductor
Power Factor
Important Formulae Related to Calculations for AC Circuits
Battery
Internal Resistance of the Cell
Connection of Cells
Battery Charging
Electrical Power and Energy
Electrical Power
Electrical Energy
Friction
Types of Friction
Normal Reaction
Limiting Friction
Laws of Friction
Coefficient of Friction
Angle of Friction
Inclined Plane
Force of Friction when the Applied force is in Horizontal Direction
Force of Friction when the Force is Inclined at an Angle q with the Horizontal
Lubrication
Force
Representation of Force
Parallel Forces
Resultant Forces
Types of Quantities
Representation of Forces
Composition of Forces
Resolution of Forces
Condition for Equilibrium of Forces Acting on a Body
Parallelogram Law of Forces
Law of Triangle of Forces
Lami’s Theorem
Jib Crane
Centre of Gravity
Gravitational Acceleration
Centre of Gravity
Examples of Centre of Gravity of Symmetric Body
Determination of Centre of Gravity for Non-symmetric Objects
Determination of Centre of Gravity Through Calculation
Condition of Equilibrium
Types of Equilibrium
Centrifugal Force
Number System
Conversion of Decimal Number System to Binary Number System
Conversion of Binary Number System to Decimal Number System
Conversion of Decimal Number System to Octal Number System
Conversion of Octal Number System to Decimal Number System
Conversion of Decimal Number System to Hexadecimal Number System
Conversion of Hexadecimal Number System to Decimal Number System
Conversion of Binary Number System to Octal Number System
Conversion of Octal Number System to Hexadecimal Number System
Conversion of Binary Number System to Hexadecimal Number System
Conversion of Hexadecimal Number System to Binary Number System
Comparison of Decimal, Binary, Hexadecimal and Octal Number
Electrical Estimate And Costing
Estimate for Internal Electric Wiring
Calculation of Load for Domestic Wiring and Selection of Cable/Wire
Calculation of Conductor Size for Domestic Internal Wiring
Load Calculation with Diversity Factor
Selection of a Cable with Permissible Voltage Drop
Preparation of List of Materials and Estimate Cost of Electrical Wiring
Graph
Main Points to Draw a Graph
Solution by Graph
Equation of Two Variables
Equation with Two Constants
Percentage, Interest and Depreciation
Percentage
Changing a Fraction into Percent
Loss and Profit
Discount
Simple Interest
Compound Interest