The law of energy conservation states that "Energy can neither be created nor destroyed, but can be transformed from one form to another"
This means that energy does not get exhausted, it is only changed from one form to another.
Examples of energy changing from ome form to another are listed below
• Mechanical energy is transformed to electrical energy in dynamos.
• Sound energy is converted into electrical enrgy in microphones.
• Electrical energy is converted to mechanical energy in electric motors