What is hydro energy ?

What is wind energy? What is the advantage of wind energy?

What is hydro-electric generator?

What is hydro metallurgy? How Cu is extracted by this method.

What is called as quantum of energy ?What is its energy?

State the energy transformation in the following: (i) electricity is obtained from solar energy. (ii) electricity is obtained from wind energy. (iii) electricity is obtained from hydro energy. (iv) electricity is obtained from nuclear energy.