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1 A generator converts mechanical energy into electrical energy. 2  A hydroelectric powerplant converts the mechanical energy of water in a storage dam into electrical energy. 3  An internal combustion engine is a heat engine that obtains mechanical energy from chemical energy by burning fuel. A hydroelectric powerplant converts the mechanical energy of water in a storage dam into electrical energy. 2  An internal combustion engine is a heat engine that obtains mechanical energy from chemical energy by burning fuel. 3  From this mechanical energy, the internal combustion engine often generates electricity.
What type of energy conversion takes place in an electrolytic cell? A) Chemical energy is spontaneously converted to electrical energy. B) Chemical energy is converted to electrical energy only when there is an external power source. C) Electrical energy is spontaneously converted to chemical energy. D) Electrical energy is converted to chemical energy only when there... show more A) Chemical energy is spontaneously converted to electrical energy. B) Chemical energy is converted to electrical energy only when there is an external power source.