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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Give an Account of the Use of Solar Energy.

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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

Give the names of two energy sources that you would consider to be exhaustible. Give reasons for your choices.


"The ignition temperature of a fuel is 80°C". What does this mean?


What is a source of energy? What are the two main categories of the sources of energy? 

 


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

 

What are the various steps which can be taken to control (or reduce) pollution caused by burning fossil fuels? 


The natural gas consists mainly of:

(a) methane
(b) ethane
(c) propane
(d) butane 


The product of petroleum used to drive heavy vehicles like trucks is:

(a) petrol
(b) kerosene
(c) diesel
(d) carbon oxide


The pollution of air caused by burning petroleum fuels (like petrol and diesel) in vehicles can be controlled by fitting a device X in the exhaust system of vehicles. 

 How does this device help in controlling air pollution? 

 


Name the original source of wind energy. 


Apart from cattle dung, what other substances can be added to a biogas plant?


Compare and contrast biomass and hydroelectricity as sources of energy.  


The fuel which is not obtained from biomass is:

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


The non-renewable source of energy among the following is:

(a) hydroelectricity
(b) sewage gas
(c) natural gas
(dgobar gas


What are non-renewable resources of energy? Give two examples of such resources.


State whether the following is True or False.

Renewable energy resources have limited supply in nature.


What is the main difference between renewable and non-renewable energy resources?


Why is charcoal considered better fuel than wood?


Which of the following is a non-renewable source of energy?


What is non-renewable resources?


Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?


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