Q.

Which is most common source of energy from which electricity is produced?

A. hydroelectricity
B. wind energy
C. coal
D. solar energy
Answer» C. coal
Explanation: coal is the most common source of energy that is being used since industrialization. modern steam boilers can burn coal in any of its form as a primary fuel. different ranks of coal available are peat, lignite, bituminous and anthracite.
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