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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 220 V line , the following appliances are operating ...

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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. A line having a total resistance of 0.2 omega delivers 10 KW at 220 V ...

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

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

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

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  10. A 50 W bulb is connected in a 200V line. Determine the current flowing...

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  11. Three equal resistor connected in series across a source of enf toget...

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

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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 electric bulbs rated as 100W. 220V and 25W,220V are connected in s...

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  15. Find the cost of electricity for running an electric motor of 1 hp the...

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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 copper kettle weighing 1000g holds 1900g of water at 19^(@)C. it tak...

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  18. A 30V storage battery is being charged by 120V d.c. supply. A resistor...

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  19. Calculate the power dissipated in the various resistances and the powe...

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  20. Calculate the rate of productive of heat in the four arms of the Wheat...

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