Question

Which source of energy makes use of the air pressure in the generation of energy?
A) Hydroelectric Power plant
B) Nuclear Reactor
C) Windmill
D) Thermal power plant

Answer 1

Hint: In this question, we have to analyze the options given and try to figure out which source of energy is required to make them work. For this, we have to take each option, define them, and their work to get the desired answer. Also, note that the name given in the options contain information about the things which produce energy to make them work.

Complete answer:
The first option is the hydroelectric power plant. As the name suggests, hydroelectric power plants derive their energy from water. When water is at a certain height, it possesses potential energy. The water is usually stored in a dam or reservoir at a height. Now, this stored water is made to flow which converts its potential energy into kinetic energy. The water then goes through the turbines to rotate around a shaft which produces electricity.
In the case of the nuclear reactor, neutrons collide with uranium atoms and split them. This splitting of uranium atoms releases neutrons from uranium which further collides with other atoms and thus causing a chain reaction. The energy released during the fission of uranium atoms is used to heat the water. The stream released by boiling water is used to spin the turbines that are connected to generators producing electricity.
Now, we have to find out how a thermal power plant works. In thermal power plants, the energy obtained from the combustion of fossil fuels is used to convert water into steam. This steam is used to rotate the turbine which is connected to a generator and produce electricity.
The windmill uses wind energy to produce electricity. The wind blows when there is a difference in air pressure in two different areas. This wind energy is used to turn two or three propeller-like blades around a rotor. This rotor is connected to a shaft that spins the generator to create electricity.
Therefore, option (C) is correct.

Note:
Energy can neither be created nor be destroyed, It can only be transformed from one form to another. There are two types of energy: renewable and non-renewable energy. Non-renewable sources of energy mainly use fossil fuels such as coal, petroleum, gas etc., which are burnt to produce energy. This type of energy, though have a higher yield, damages the environment by producing greenhouse gases.
On the other hand, renewable sources of energy are those which are abundantly available and can be continuously replenished. Solar energy, wind energy, tidal energy are some examples.