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Sources Of Energy

Question

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What is meant by the transformation of energy? Explain giving an example.

Solution

Transformation of energy refers to change of one form of energy into another form of energy.
The different forms of energy are:
potential energy, kinetic energy, chemical energy, heat energy, solar energy, electrical energy and light energy.
When a body from a height falls to the ground, its potential energy is converted into kinetic energy and then into heat energy.

Some More Questions From Sources of Energy Chapter

What are the characteristics of a good source of energy?

Explain the classification of different sources of energy?

Energy can neither be created nor destroyed. Then why is there so much fuss about energy crisis?

List any four sources of energy which are selected for use for a given activity.

1. Energy to run a cycle
2. Energy to run a car
3. Energy to cook food
4. Energy to work on

Classify the following as renewable and non-renewable sources of energy.
Coal, flowing water, geothermal energy, nuclear energy, biogas, natural gas, petroleum, ocean waves, wood, flowing wind, cooking gas, biomass, hydroelectric power.

'Replenishment of energy source like wood takes a long time but it is considered as renewable source of energy.' Comment.

What constitutes a source of energy?

State the two forms in which energy is mainly utilised at our homes.

What is meant by the transformation of energy? Explain giving an example.

When a body falls freely to the ground, its velocity reduces to zero and the sum total of kinetic energy and potential energy also becomes zero. Does it violate the law of conservation of energy?

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