Answer :

The picture A shows solar panels which generate while picture B shows wind mill. The Solar panel uses solar energy to generate power while Wind mill uses wind energy to generate power.

i) It is true that both of the methods are non-polluting & environment friendly as they don’t release any toxins in the environment. Also, there’s plenty of sunlight and wind so there’s no risk of exhaustion of the major source of energy.

ii) The applications of Solar Energy are-

• Solar electric power generation – The solar energy is converted into electrical energy with the help of solar cells.

• Solar Water Heater – The solar energy converted into heat for heating water.

iii) A photovoltaic cell is a device which converts solar energy directly into electrical energy by photovoltaic effect (generation of electric current when exposed to sunlight).

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