Home
Class 9
PHYSICS
(a) Derive the relation between commerci...

(a) Derive the relation between commercial unit of energy (kWh) and SI unit of energy (joule).
(b) A certain household consumes 650 units of electricity in a month. How much is this electricity in joules ?

Text Solution

Verified by Experts

The correct Answer is:
(b) `2.34 xx 10^(9) J`
NA
Promotional Banner

Topper's Solved these Questions

  • WORK AND ENERGY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Long Answer Type Questions|2 Videos

  • WORK AND ENERGY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Multiple Choice Questions|1 Videos

  • WORK AND ENERGY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Multiple Choice Questions|1 Videos

  • SOUND

    LAKHMIR SINGH & MANJIT KAUR|Exercise Value Based Questions|20 Videos

Similar Questions

Explore conceptually related problems

A certain household has consumed 250 units of electric energy during a month.How much energy is this in joules ?

A certain household has consumed 250 units of energy during a month. How much energy is this in joules ?

State the commercial unit of electric energy.

SI unit of electric charge is

The unit of electric energy is :

A family uses 250 units of electrical energy during a mont. Calculate this electrical energy in joules.

LAKHMIR SINGH & MANJIT KAUR-WORK AND ENERGY-Exercise
  1. A car of weight 20000 N climbs up a hill at a steady speed of 8 m/s, g...

    Text Solution

    |

  2. (a) What is the meaning of the symbol kWh ? What quantity does it repr...

    Text Solution

    |

  3. (a) Derive the relation between commercial unit of energy (kWh) and SI...

    Text Solution

    |

  4. (a) Define power. Give the SI unit of power. A boy weighing 40 kg ca...

    Text Solution

    |

  5. When a body falls freely towards the earth, then its total energy

    Text Solution

    |

  6. Which one of the following is not the unit of energy?

    Text Solution

    |

  7. Which of the following energy change involves frictional force?

    Text Solution

    |

  8. An electric motor raises a load of 0.2 kg, at a constant speed, throug...

    Text Solution

    |

  9. An object is falling freely from a height x. After it has fallen a hei...

    Text Solution

    |

  10. COMMERCIAL UNIT OF ENERGY

    Text Solution

    |

  11. How much energy does a 100W electric bulb transfer in 1 minute?

    Text Solution

    |

  12. The device which converts mechanical energy into energy which runs our...

    Text Solution

    |

  13. A microphone converts

    Text Solution

    |

  14. The following data was obtained for a body of mass 1 kg dropped from a...

    Text Solution

    |

  15. A ball falls to the ground as shown below : (a) What is the kinet...

    Text Solution

    |

  16. In an experiment to measure his power, a student records the time take...

    Text Solution

    |

  17. In loading a truck, a man lifts boxes of 100 N each through a height o...

    Text Solution

    |

  18. Name the energy transfers which occur when : (a) an electric bell ri...

    Text Solution

    |

  19. A force of 7 N acts on an object. The displacement is, say 8 m, in the...

    Text Solution

    |

  20. When do we say that work is done ?

    Text Solution

    |