Question

Which of the following is an example of a non-conventional source of energy?
A). Solar energy
B). Geothermal energy
C). Tidal energy
D). All of these

Answer 1

Non conventional energy also known as renewable energy sources are those sources that are recharged by natural processes. These sources are inexhaustible unlike the conventional sources.

Complete Step By Step Answer:
The Sun is the source of solar energy. Photovoltaic cells like solar panels are used to convert the solar energy into electric energy. Energy production from this source is only possible in regions receiving a good amount of sunlight.
Geothermal energy is the energy obtained from inside the planet which was generated during the original formation of the planet and radioactive decay of materials. This energy is stored in rocks and fluids in the centre of the earth, and is carried to the surface by water or steam.
The tides formed in oceans and seas due to gravitational effects of other bodies like the moon and rotation of earth are responsible for the production of tidal energy. The tides are passed through turbines which rotate and in turn produce electricity.
Option D (all of these) is the correct answer.

Note:
Non conventional energy sources produce very low or no pollution compared to conventional sources. . These sources are recently being used more than in the past. Wind and hydro are some other examples of non conventional energy sources. Conventional energy sources are finite. Coal, oil are some conventional energy sources. Currently most of the energy in the planet is being produced from conventional sources which is polluting the earth.