Explain Generation of electrical energy

Generation of electrical energy: The conversion of energy available in dissimilar forms  in nature into electrical energy is called as "Generation of  electrical energy". The electrical energy must be produced and transferred to the point of use at the instant it is required. The entire process takes only a fraction of a second. 

Energy is available in several forms from dissimilar natural sources such as pressure head of water, chemical energy of fuels, nuclear energy  of radioactive substances etc. All these forms of energy can be changed into electrical energy by using suitable arrangements.