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Distinguish between the resistivity and ...

Distinguish between the resistivity and conductivity of a conductor .

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SURA PUBLICATION-ELECTRICITY-TEXTBOOK EVALUATION (
  1. One unit of electrical energy consumed is equal to 1000 kilowatt hour.

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  2. The effective resistance of three resistors connected in series is les...

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  3. Assertion: In a simple battery circuit the point of highest potential ...

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  4. Assertion: LED bulbs are far better than incandescent bulbs. Reason:...

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  5. What happens to the resistance, as the conductor is made thicker ?

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  6. Why is tungsten metal used in bulbs, but not in fuse wires ?

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  7. Name any two devices, which are working on the heating effect of the e...

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  8. What is the role of the earth wire in domestic circuits ?

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  9. State Ohm's law .

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  10. Distinguish between the resistivity and conductivity of a conductor .

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  11. What connection is used in domestic appliances and why ?

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  12. What is meant by electric current ?

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  13. Define the unit of current.

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  14. The device used to measure electric current is .

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  15. Joule law of heating is .

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  16. An alloy of nickel and chromium is used as the heating element . Why ?

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  17. How does a fuse wire protect electrical appliances ?

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  18. Explain about domestic electric circuits. (circuit diagram not require...

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  19. What are the advantages of LED TV over the normal TV ?

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  20. List the marits of LED bulbs.

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