Q. Over 20,000 water pumps are powered by:

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Q. In 2010, 'USA' has completed a target of roof top solar system, roundabout:

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Q. In a storage tank, hot water is required for:

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Q. Almost 1.1 million, solar home system and solar lanterns, installed in Asia and

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Q. Back tube of solar water heater is surrounded with a:

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Q. In 1995, Austrian Government had installed:

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Q. 'silicon photovoltaic' solar cell consists of a thin slice of:

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Q. Cost of energy from solar cells has reduced over past

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Q. Thermal energy from sun is used for heating buildings in

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Q. A black surface, capable of facing full sunlight, can absorb

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Q. Japan has installed rooftop

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Q. In a panel of cells, area of one square metre is being directly exoposed to sunlight, generates

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Q. Sunlight can be converted directly into electricity by means of

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Q. Wall of a building, acting as a passive solar collector, process is known as,

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Q. An average annual, total installed world PV capacity increases

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Q. Single crystal silicon is less convenient for mass production than

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Q. Why back tube of solar water heater is surrounded with a vaccum?

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Q. In solar home system, an estemates of 15 to 75 watt energy gained by

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Q. In 1998, total installed world capacity of PV increased, approximately

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Q. In USA, solar thermal installations provide over 350 MW for

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