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Explain the following : Why is the tungs...

Explain the following : Why is the tungsten used almost exclusively for filament of electric lamps?

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MODERN PUBLICATION-ELECTRICITY-EXERCISE
  1. Define one watt hour.

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  2. A cylinder of a material is 10 cm long and has a cross section of 2 cm...

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  3. Explain the following : Why is the tungsten used almost exclusively fo...

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  4. A resistance of 10 ohm is bent in the form of a closed circle. What is...

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  5. Why is much less heat generated in long electric cables than in filame...

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  6. State which has a higher resistance a 50 W or a 25 w lamp bulb and how...

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  7. Pick out conductors and insulators from the following Metals, Glass, R...

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  8. Pick out conductors and insulators from the following Metals, Glass, R...

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  9. Pick out conductors and insulators from the following Metals, Glass, R...

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  10. Pick out conductors and insulators from the following Metals, Glass, R...

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  11. Pick out conductors and insulators from the following Metals, Glass, R...

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  12. Pick out conductors and insulators from the following Metals, Glass, R...

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  13. Name a source of emf.

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  14. What is SI unit of electric potential?

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  15. What is meant by saying that the potential difference between two poin...

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  16. you are given three resistors of 10 ohm 10 ohm and 20 Ohm a battery of...

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  17. The electrical resistivity of few materials is given below in ohm-metr...

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  18. An electric geyser has rating 2000W, 220V marked on it. What should be...

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  19. Explain the following:How does the resistance of a wire vary with its ...

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  20. SI unit of current is:

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