Different forms of energy can be used to do work. Electrical energy is of limited use to us unless we have ways to convert it to beneficial forms of energy. Household appliances are devices that convert electrical energy to useful energy. The electrical energy might have been produced by heat, light, nuclear, chemical, or mechanical energy. Chemical energy can be used to produce electrical energy by using the wet cell, dry cell, and storage battery.
Chemical energy is stored in molecules of matter.
Chemical energy is stored energy that is given off when some molecules of matter react with each other. The wet cell, dry cell, and storage battery are examples of stored chemical energy. Mechanical energy can be changed to electrical energy. This energy is produced through an electric generator. Nearly all the electric energy used today is produced by electric generators.