Question

An inexhaustible non-conventional energy source
A) Coal
B) Petroleum
C) Solar radiation
D) Electricity from nuclear plants

Answer 1

Energy can be defined as the ability to perform work or a particular function. Energy sources can be broadly classified into two categories- conventional energy source and non-conventional energy source.

Complete answer:
Conventional sources of energy are those which are obtained from natural sources thus present in a limited amount. They can be depleted by continuous use and cannot be regenerated at the speed at which it is being used up, thus they are also known as non-renewable sources of energy. Few examples of it are coals, fossil fuels and natural gas.

Non-conventional sources of energy are also known as renewable sources of energy since they do not get exhausted even after continuous usage. They are continuously produced by natural processes and the rate of production catches up with the rate of usage. Few examples of non-conventional sources of energy are solar energy which is obtained from sun, wind energy, hydro energy which is obtained from water, etc. conventional sources of energy are mostly used for industrial as well as commercial purposes whereas the non-conventional sources of energy are used mostly for household purposes.

Hence the correct answer is option (C) Solar radiation.

Note: Non-conventional sources of energy are preferred over conventional sources of energy because non-conventional sources of energy are known to produce environmental pollution and is also a contributing factor to the current global warming situation. On the other hand non-conventional sources of energy are environment friendly.