Home
Class 12
PHYSICS
Two electric lamps are rated as 220V. 40...

Two electric lamps are rated as 220V. 40 W and 220V,60W. Find the heat generated per second in lamp when they are connected in series across 220V mains. Given 1 cal=4.2J.

Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATIC FORCES, CHARGES AND FIELDS

    SL ARORA|Exercise Problems For Self Practice|1 Videos

  • MAGNETIC EFFECTS OF CURRENT

    SL ARORA|Exercise TYPE C|4 Videos

Similar Questions

Explore conceptually related problems

Two bulbs are rated as 220 V-100W and 220 V-60 W. How much power will be consumed when both of them are connected in series across the supply of 220 V ?

Two electric lamps A and B marked 220 V, 100 W and 220 V, 60 W respectively. Which of the two lamps has higher resistance ?

Two bulbs are marked 220 V, 100 W and 220 V, 50W respectively. They are connected in series to 220 V mains. Find the ratio of heats generated in them.

Two bulbs are market 220V, 100W and 220V,50W respectively. They are connected in series to 220V mains. Find the ratio of heats generated in them.

Two bulbs are market 220V, 100W and 220V,50W respectively. They are connected in series to 220V mains. Find the ratio of heats generated in them.

Two bulbs 60 W and 100 W designed for voltage 220 V are connected in series across 220 V source. The net power dissipated is

An electric bulb is rated at 220V, 100W. What is its resistance?

SL ARORA-HEATING EFFECT OF CURRENT-All Questions
  1. Two bulbs are market 220V, 100W and 220V,50W respectively. They are co...

    Text Solution

    |

  2. We have a 30 W, 6 V bulb , which we want to glow by a supply of 120 V ...

    Text Solution

    |

  3. Two electric lamps are rated as 220V. 40 W and 220V,60W. Find the heat...

    Text Solution

    |

  4. In a house having 220 V line , the following appliances are operating ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |