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Give two reasons why different electrica...

Give two reasons why different electrical appliances in a domestic circuit are connected in parallel.

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(a) Which is the better way to connect lights and other electrical appliances in domestic wiring: series circuits or parallel circuits? Why? (b) Christmas tree lamps are usually wired in series. What happens if one lamp breaks? (c) An electrician has wired a house in such a way that if a lamp gets fused in one room of the house, all the lamps in other rooms of the house stop working. What is the defect in the wiring? (d) Draw a circuit diagram showing two electric lamps connected in parallel together with a cell and a switch that works both lamps. Mark an A on your diagram to show where an ammeter should be placed to measure the current.

When two electric bulbs of 40W and 60W are connected in parallel, then the:

Initially two capacitors are charged to different potential differences as shown in figure and then connected in parallel as shown. Which of the following is incorrect about this circuit?

Give one reason for not using series arrangement for domestic circuits.

Three incandescent bulbs of 100 W each are connected in series in an electric circuit. In another circuit, another set of three bulbs of the same wattage are connected in parallel to the same source. (a) Will the bulbs in the two circuits glow with the same brightness ? Justify your answer. (b) Now let one bulb in both circuits get fused. Will the rest of the bulbs continue to glow in each circuit ? Give reason. (a) In a household electric circuits, different appliances are connected in parallel to one another. Give two reasons for the same. (b) An electrican puts a fuse of rating 5 A in that part of domestic electrical circuit in which electrical heater of rating 1.5 kW, 220 V is operating. What iis likely to happen in this case and why ? What change, if any, needs to be made ?

LAKHMIR SINGH & MANJIT KAUR-MAGNETIC EFFECT OF ELECTRIC CURRENT -Exercise
  1. In which wire in a A.C. Housing circuit is the swicth introduced...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  18. The maximum number of 40 W tube-lights connected in parallel which can...

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  19. In normal use, a current of 3.5 A flows through a hair dryer. Choose a...

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  20. Which one of the following statements is not true ?

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