Question
Describe any three non-conventional sources of energy.
Solution
The non-conventional sources of energy are described below:
(i)Solar energy: Sun’s heat and light energy can be felt by us every day. Solar energy trapped from the sun can be used in solar cells to produce electricity. Solar energy is also used in solar heaters, solar cookers, solar dryers besides being used for community lighting and traffic signals.
(ii)Wind Energy: Wind is an inexhaustible source of energy. In modern time wind mills, the high speed winds rotate the wind mill which is connected to a generator to produce electricity. Wind farms having clusters of such wind mills are located in coastal regions and in mountain passes where strong and steady winds blow.
(iii)Geothermal Energy: Heat energy obtained from the earth is called geothermal energy. The temperature in the interior of the earth rises steadily as we go deeper. Some times this heat energy may surface itself in the form of hot springs. This heat energy can be used to generate power.
