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प्रश्न
What do you understand by the term 'transformation of energy"? Explain with an example.
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उत्तर
The change of one form of energy into another form is known as transformation of energy. This process helps us to convert one form of energy into a more desirable form of energy.
Example - Energy transformation at a hydroelectric power plant
At a hydroelectric power station, a dam is built on a river. Water collected in the reservoir has lots of potential energy. The potential energy of the water gets converted into kinetic energy as it begins to fall down. The kinetic energy of falling water is used to drive huge turbines, which are connected to the electric generator.
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संबंधित प्रश्न
Name the device or machine which convert :
Electrical energy into light energy.
Name the device or machine which convert :
Chemical energy into kinetic energy (or mechanical energy).
How much electrical energy in joules does a 100 watt lamp consume : in 1 second?
How much electrical energy in joules does a 100 watt lamp consume : in 1 minute?
The hanging bob of a simple pendulum is displaced to one extreme position B and then released. It swings towards centre position A and then to the other extreme position C. In which position does the bob have :
(i) maximum potential energy?
(ii) maximum kinetic energy?
How much electric energy in kWh is consumed by an electrical appliance of 1000 watts when it is switched on for 60 minutes?
Name the energy transfers which occur when :
someone speaks into a microphone
Name the energy transfers which occur when : there is a picture on a television screen
Which of the following energy change involves frictional force?
In the case of negative work, the angle between the force and displacement is
