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Name the device used to protect the elec...

Name the device used to protect the electric circuits from overloading and short circuits.

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ICSE-HOUSEHOLD CIRCUITS -EXERCISE -9(B)
  1. What is a fuse ? Name the material of fuse. State one characteristic o...

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  2. Name the device used to protect the electric circuits from overloading...

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  3. Complete the following sentences : A fuse is a short piece of wire ...

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  4. Complete the following sentences : A fuse wire is made of an alloy...

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  5. Complete the following sentences : A fuse is connected in......... ...

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  6. Complete the following sentences : Higher the current rating, .. .....

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  7. Complete the following sentences : Live wire is also called .... wi...

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  8. Why is the fuse wire fitted in a porcelain casing?

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  9. How is a fuse put in an electric circuit ? State the purpose of using ...

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  10. Describe with the aid of a diagram some form of a fuse which is used i...

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  11. Why should switches always be connected to the live wire?

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  12. How does the (i) thickness and (ii) length of a fuse wire depend on it...

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  13. Two fuse wires are rated 5 A and 20 A. Which of the two is (i) thicker...

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  14. Explain the meaning of the statement, 'The current rating of a fuse is...

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  15. 'A fuse is rated 8 A'. Can it be used with an electrical appliance of ...

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  16. Name two safety devices which are connected to the live wire of a hous...

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  17. An electric kettle is rated 3 kW, 250 V. Give reason whether this kett...

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  18. What is the purpose of a switch in a circuit ?

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  19. Why should switches always be connected to the live wire?

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  20. Give one precaution that should be taken while handling switches.

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