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प्रश्न
What is meant by the renewable and non-renewable sources of energy? State two differences between them, giving two examples of each
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उत्तर
Renewable: The natural sources providing us energy continuously are called renewable sources of energy.
Non-renewable: The sources of energy that have accumulated in nature over a very long period of time and cannot be quickly replaced when exhausted are called non-renewable sources of energy.
Difference:
|
Renewable sources |
Non-renewable sources |
|
They can be utilised continuously. |
They cannot be utilised once exhausted. |
|
Examples: Sun, Wind |
Example: Coal, Petroleum |
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संबंधित प्रश्न
The fuel having the lowest calorific value is:
(a) coal
(b) wood
(c) charcoal
(d) kerosene
Calorific value and ignition temperature of fuel X are 75 kJ/g and 20°C respectively. These values for fuel Y are 50 kj/g and 75°C respectively. On burning, the fuel Y produces only CO2while fuel X produces CO2 and CO. Which of the two is a better fuel? Give two reasons to support your answer.
Describe how fossil fuels were formed.
The main constituent of petroleum gas is:
(a) methane
(b) ethane
(c) butane
(d) propane
The non-renewable source of energy among the following is:
(a) hydroelectricity
(b) sewage gas
(c) natural gas
(d) gobar gas
Fill in the blank
Solar cells use the power supplied by the ______.
What are fossil fuels?
Can you tell?
What is ‘green energy’?
What is non-renewable resources?
Why is there a need to harness non-conventional sources of energy? Give two main reasons.
