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When does an electric short-circuit occu...

When does an electric short-circuit occur?

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LAKHMIR SINGH & MANJIT KAUR-MAGNETIC EFFECT OF ELECTRIC CURRENT -Exercise
  1. List the colours of the three wires in the cable connected to the p...

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  2. If fuse of 250 mA, 500 mA, 1 A, 5 A, and 10 A were available, which ...

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  3. When does an electric short-circuit occur?

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  4. In which wire in a A.C. Housing circuit is the swicth introduced...

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  5. In household circuits, is a fuse wire connected in series or in parall...

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  6. Give two reasons why different electrical appliances in a domestic cir...

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  7. What is the usual colour of the insulation of : (a) live wire, (b) neu...

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  8. What is the main purpose of earthing an electrical appliance ?

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  9. Give two reasons why different electrical appliances in a domestic cir...

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  10. How should the electric lamps in a building be connected so that the s...

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  11. Fill in the following blanks with suitable words : (a) A fuse should...

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  12. (a) Of what substance is the fuse wire made ? Why ? (b) Explain why...

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  13. What type of elastic fuse is used in electrical appliances like car st...

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  14. Distinguish between the terms 'overloading' and 'short-circuiting' as ...

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  15. (a) When does a fuse cut off current ? How does it do it ? (b) What ...

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  16. Explain the importance of using in a household electric circuit (i) fu...

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  17. (a) An electric iron is rated at 230 V, 750 W. Calculate (i) the maxim...

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  18. What is the function of an earth wire? Why is it necessary to earth me...

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  19. (a) What current is taken by a 3 kW electric geyser working on 240 V m...

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  20. A 1.25 kW heater works on a 220 V mains supply. What current rating wo...

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