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How many 60W bulbs may be safely used on...

How many 60W bulbs may be safely used on 220V line using a 5A fuse?

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How many sixty watt (60 W) bulbs may be safely used in a 240-V supply with 4-ampere fuse?

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SL ARORA-HEATING EFFECT OF CURRENT-All Questions
  1. Two electric lamps are rated as 220V. 40 W and 220V,60W. Find the heat...

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  2. In a house having 220V line, the following appliances are working : (i...

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  3. How many 60W bulbs may be safely used on 220V line using a 5A fuse?

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  4. An electric heater consists of 10m long nichrome wire of 2.5xx10^(-6)m...

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  5. The resistances of 20Omega are connected to a source of emf. Calculate...

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  6. An electric motor operating on a 30V supply draws a current of 10A and...

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  7. A line having a total resistance of 0.2Omega delivers 10kW at 220V to ...

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  8. A motor operating on 120V V draws a current of 2 A. if the heat is dev...

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  9. A small electric motor is rated 1/8H.P. and is running at 230V supply....

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  10. A 500W electric heater is designed to work with a 200 V line. If the v...

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  11. Three equal resistors connected in series across a source of emf toget...

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  12. A room is lighted by 200W, 124V incandescent lamps fed by a genrator w...

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  13. An electric heater consists of 20m length of manganin wire of 0.23 m^(...

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  14. Two wires A and B of same material and mass, have their lengths in the...

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  15. Find the cost of electricity for running an electric motor of 1H.P. fo...

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  16. The heater coil of an electric kettle is rated as 2000W at 200V. How m...

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  17. A 40 V battery of internal resistance 6 Omega is connected to a variab...

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  18. An accumulator of emf epsilon and internal resistance r is first conne...

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  19. A current of 2A is passed through a wire immersed in 80 g of water ini...

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  20. A storage battery of emf 8V, internal resistance 1Omega, is being char...

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