Physics (NTSE/Olympiad)  

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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