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(a) What current is taken by a 3 kW elec...

(a) What current is taken by a 3 kW electric geyser working on 240 V mains ?
(b) What size fuse should be used in the geyser circuit ?

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The correct Answer is:
N/a
(a) 12.5 A (b) 13 A fuse
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LAKHMIR SINGH & MANJIT KAUR-MAGNETIC EFFECT OF ELECTRIC CURRENT -Exercise
  1. (a) An electric iron is rated at 230 V, 750 W. Calculate (i) the maxim...

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

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

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

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

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

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

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  8. A car headlamp of 48 W works on the car battery of 12 V. The correct f...

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  9. A 3-pin mains plug is fitted to the cable for a 1 kW electric kettle t...

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  10. A T.V. set consumes an electric power of 230 watts and runs on 230 vol...

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  11. An MCB which cuts off the electricity supply in case of short-circuiti...

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  12. An air-conditioner of 3.2 kW power rating is connected to a domestic e...

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  13. Three appliances are connected in parallel to the same source which pr...

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  14. A vaccum cleaner draws a current of 2 A from the mains supply (a) Wh...

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  15. An electric kettle rated as 1200 W at 220 V and a toaster rated at 100...

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  16. What is the main difference in the wiring of an electric bulb and a so...

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  17. A domestic lighting circuit has a fuse of 5 A. If the mains supply is ...

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  18. Why does a compass needle get deflected when brought near a bar magnet...

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  19. Draw magnetic field lines around a bar magnet.

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  20. List the properties of magnetic lines of force.

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