Q41 of 54 Page 135

What is electrical energy? How electrical energy is generated in the following power plant? Explain

(a) Hydro electric power plant (b) Wind energy power plant (c) Solar energy power plant.

The energy possessed by charged particles is called electrical energy.


Electrical energy is generated in the power plants in the following way:


(a) Hydro electric power plant: In hydro power plants the potential energy of water is increased by storing it into dams. The energy is converted into kinetic energy of water and this kinetic energy is used to rotate the turbine. The generators connected with the turbine generate electricity.


(b) Wind energy power plant: In windmills, the kinetic energy of the winds is used to rotate the turbine and generate electricity by the turbines.


(c) Solar energy power plant: In solar panels, the energy is produced by the solar cells; they convert solar energy into electrical energy.


When the rays fall on solar panel these cells accept photons and activate electrons. These charged particles flow in the form of electric current in the circuit.


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