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We know that heat is emitted along with ...

We know that heat is emitted along with light when a bulb glows. .LED lamps are better than filament bulbs for maximum reduction in the consumption of electrical energy. Explain. Are there situations where filament. bulbs are used for producing Light energy? Give examples.

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  2. We know that heat is emitted along with light when a bulb glows. .LED ...

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  3. Identify the situations where electrical energy is stored up as chemic...

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  4. You can make a small generator to convert mechanical energy into elect...

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  5. Metling of wax is a .....

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  6. …………is the source of many forms of energy

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  7. An example of fossil fuels

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  8. The tertiary follicle further changes into mature follicle called

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  9. Rusting of iron is a ……….

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  10. Plants convert.... . Into chemical energy through photosynthesis

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  11. Example for chemical change

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  12. ln the process of burning of fuel chemi- cal energy is changed into he...

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  13. Substance which liberate a lot of t while burnig are caused.......

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  14. ...... energy is needed for the of an engine of vehicles

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  15. Digestion of food, Condensation of clouds lead to rain, Rusting of ir...

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  16. Evaporation of water, Melting of ghee, Rusting or iron, Dissolving su...

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  17. Petroleum, Natural gas, Goal, Biogas

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  18. Find out the energy changes in the following statements? An electric ...

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  19. How does coal, petroleum and natural gas are produced?

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  20. The energy sources like sunlight, wind, water and biogas are used mor...

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