Working Principle behind common things

Working Principle behind common things


Apparatus/ Equipment/Effect Works on Principle of
Jet Plane Principle of conservation of linear momentum
Rocket Principle of conservation of linear momentum
Fountain Pen Surface Tension
Detergent /Soap Surface Tension
Optical Fibre Total internal reflection
Diamond Total internal reflection
Microscope Refraction
Spectacles Refraction
Magnifying Glass Refraction
Gyroscope Moment of Inertia
Wheel Moment of Inertia
Barometer Atmospheric  Pressure
Water Pump Atmospheric  Pressure
Rainbow Dispersion/ Deviation
Prism Dispersion/ Deviation
Electron microscope Concurrent beam of electrons
Telescope refraction /reflection
Radio telescope radio imaging
See-saw Mechanical lever/couple
Heat Engine Carnot’s cycle/theorem
Scissors Mechanical lever
Plaires Mechanical lever
Radio transmission Radio waves
TV transmission VHF/UHF
Fan regulator Resistor
Battery Electrochemical Energy
Dynamo Electro-magnetic Induction
Transformer Electro-magnetic Induction
Electric Bulb Heating effect of electric current
Electric heater Heating effect of electric current
Refrigerator Carnot's theorem
Tube Light Electric discharge/fluorescence
Thermometer Thermal expansion
dynamo plaires radio telescope

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