Chapter : 3. Work and Energy
Transformation Of Energy
Definition : The change of one form of energy into another form of energy is known as transformation of energy.
Different Forms of Energy Heat energy : Burning of fuels like diesel or petrol in vehicles provides heat energy to do work.
Electrical energy : Electric motors are used in home, industry and even for driving electric trains.
Light energy :When light energy falls on light-meter used in photography, it causes its pointer to move across a scale.
Sound energy :Sound energy causes a thin plate of microphone diaphragm to vibrate.
Chemical energy : Chemical energy is the source of energy in our food and it provides us energy to move the various objects.
Nuclear Energy :The energy in the nucleus of an atom is used to produce heat energy which in turn is used to generate electrical power.
| Device used | Energy tranformation |
| Form | to |
| Steam engine | Heat | Mechanical |
| Electric fan | Electrical | Mechanical |
| Electric lamp | Electrical | Light and Heat |
| Electric heater | Electrical | Heat |
| Microphone | Sound | Electrical |
| Solar cell | Solar heat | Electrical |
| Photo-cell | Light | Electrical |
| Car engine | Chemical | Heat, Mechanical |
| Electric cell/batteries | Chemical | Electrical |
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