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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Give an Account of the Use of Solar Energy. - Geography

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प्रश्न

Give an account of the use of solar energy.

टीपा लिहा
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उत्तर

Solar energy is the energy that we receive from the sun. It is readily available in nature and in unlimited quantities.
While there are several ways to obtain solar energy, one way is by the use of solar cells or photovoltaic panels. These panels are made from very thin semiconducting materials which, when exposed to sunlight, use the heat and light of the sun to shake the electrons loose and create an electric current.
Solar cells are used for lighting street lamps, electronic calculators, watches, smartphones, cameras, traffic signals, water pumps, and home lighting. Solar energy is being used to heat ovens, cook food, and heat water.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 11: Renewable and Non-renewable resources - Answer the questions in one or two paragraph

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ऑक्सफोर्ड युनिव्हर्सिटी प्रेस Voyage Geography [English] Class 7
पाठ 11 Renewable and Non-renewable resources
Answer the questions in one or two paragraph | Q 1

संबंधित प्रश्‍न

Define ignition temperature of a fuel.


What is meant by a renewable source of energy? Give two examples of renewable sources of energy.

 

Classify the following into renewable and non-renewable sources of energy:
Coal, Wind, Tides, Petroleum,Wood, Natural gas 


A non-renewable source of energy is:

(a) wood
(b) alcohol
(c) hydrogen gas
(d) natural gas


State two important uses of natural gas


Why is the leakage of LPG detected easily although it is odourless? State the steps to be taken in case its leakage is detected in the kitchen.


 Describe how fossil fuels were formed.


Which of the following is needed for the formation of biogas from cow-dung and which not?
Water, Oxygen


Name the clean fuel which can be obtained from cow-dung. 


State whether the following statement is true or false:
Tidal energy is one of the forms in which solar energy manifests itself in oceans.


Fill in the following blank with suitable word:       

Biomass is another form in which ........... energy manifests itself.


The fuel which is not obtained from biomass is:

(a) firewood
(b) cow-dung cakes
(c) coke
(d) charcoal


Fill in the blank

Coal, petroleum, and natural gas are _________fuels.


State whether the following is True or False.

Coal takes millions of years to form.


Describe the four major types of coal.


Can you tell? 

Which forms of energy from the sun are used in solar energy devices?


Why are fossil fuels called non-renewable sources of energy?


Name two forms of sea energy.


Write about Renewable resources.


Air is a natural resource and cannot be exhausted by human activities. It is known as inexhaustible natural resource. Which of the following is another inexhaustible natural resource?


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