12th Class Geography Solved Paper - Geography 2018

  • question_answer 'The non-conventional sources of energy will provide more sustained, eco-friendly and cheaper energy if the initial cost is taken care of.' Examine the statement.

    Answer:

    The non-conventional sources of energy will provide more sustained, eco-friendly and cheaper energy if the initial cost is taken care of.
    Non-conventional sources of energy are: Sustainable energy resources like solar, wind and bio-mass. Some are enlisted below:
    (i) Solar energy: Sun rays trapped in photovoltaic cells can be converted into energy. The two effective processes considered to be very effective to tap solar energy are photovoltaics and solar thermal technology.
    1. Photovoltaic solar technology: It directly converts sunlight into electricity using panels made of semiconductors cells.
    2. Solar thermal technology: It captures the sun?s heat. This heat is used directly or converted into mechanical energy and in turn electricity, known as concentrated solar power. It is cost competitive environmentally friendly and easy to construct. The western part of India has greater potential for the development of Solar Energy in Gujarat and Rajasthan.
    (ii) Wind Energy: It is absolutely pollution free, inexhaustible source of energy. The mechanism of energy conversion from blowing wind is simple.
                India already has started generating wind energy.
                Thus, such non-conventional sources of energy are eco-friendly and cheaper.


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