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What is the purpose of a switch in a cir...

What is the purpose of a switch in a circuit ?

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ICSE-HOUSEHOLD CIRCUITS -EXERCISE -9(B)
  1. Name two safety devices which are connected to the live wire of a hous...

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

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

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

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

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  6. The switch should not be touched with wet hands.

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  7. Name the wire in a household electrical circuit to which the switch is...

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  8. It is dangerous to connect the switch in the neutral wire. Explain you...

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  9. Draw the diagram of a dual control switch when the appliance is switch...

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  10. Draw a circuit diagram using the dual control switches to light a stai...

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  11. What purpose is served by the terminals of a three way pin plug ? Draw...

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  12. The diagram in Fig. shows a three pin plug. Label the three pins. ...

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  13. The diagram in Fig. shows a three pin plug. Label the three pins. ...

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  14. Draw a labelled diagram of a three pin socket.

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  15. The diagram in Fig. shows a three-pin socket marked as 1, 2 and 3. ...

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  16. The diagram in Fig. shows a three-pin socket marked as 1, 2 and 3. ...

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  17. The diagram in Fig. shows a three-pin socket marked as 1, 2 and 3. ...

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  18. What do you mean by the term local earthing ? Explain how it is done.

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  19. To which wire is the metallic case of an electric appliance connected ...

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  20. The earthing of an electric appliance is useful only if the fuse is in...

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