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प्रश्न
List and describe the sources of heat.
संक्षेप में उत्तर
उत्तर
- Sun: It is the primary source of light and it gives us light and heat.
- Combustion: Heat energy can be generated by the burning of fuels like wood, Kerosene, Coal, Charcoal, Petrol, etc.
- Friction: We can generate heat by rubbing two surfaces of some substances.
- In the past, people used to rub two stones together to light fire.
- Electricity: When Electric current flows through a conductor, heat energy is produced. Ex.: Iron box, Electric kettle.
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