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11. In microphone, the sound energy changes into electrical energy.
12. Electrical energy, on flowing through the speaker of an audio system, changes
into sound energy.
13. In electric heaters, electric ovens and geysers, the electrical energy changes into
heat energy.
14. In a locomotive, the chemical energy of coal changes into heat energy. The heat
energy then changes into kinetic energy of steam which drives the locomotive.
15. In an electric generator, the mechanical energy changes into electrical energy.
16. In a photovoltaic cell, the light energy changes into electrical energy.
17. In television the electrical energy changes into light energy and sound energy.
18. On burning the fuels, their chemical energy changes into heat energy and light
energy.
19. When a match stick is rubbed against the side of a match box, the chemical
energy changes into heat energy and light energy.
20. When a cracker is exploded, the chemical energy (stored in the chemical used in
the cracker) changes into heat, light and sound energies.
21. During photosynthesis, light energy changes into chemical energy in the
presence of chlorophyll.
22. During respiration the chemical energy of food changes into heat energy. It is
the heat energy which keeps our bodies warm. It is also the heat energy which changes
into mechanical energy during locomotion.
23. During charging of a battery the electrical energy changes into chemical energy.
24. During nuclear fission or fusion, it is the nuclear energy which ultimately
changes into heat energy and light energy.