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Two fuse wires are rated 5 A and 20 A. W...

Two fuse wires are rated 5 A and 20 A. Which of the two is (i) thicker, (ii) longer ?

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(i) 20 A fuse wire (ii) both may be of same length.
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ICSE-HOUSEHOLD CIRCUITS -EXERCISE -9(B)
  1. Why should switches always be connected to the live wire?

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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