Home
Class 12
PHYSICS
A light bulb is rated at 100 W for a 220...

A light bulb is rated at 100 W for a 220V ac supply. Calculate the resistance of the bulb.

Text Solution

Verified by Experts

`P=V^2/R`or,`R=V^2/P=(220)^2/100=484Omega`
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    CHHAYA PUBLICATION|Exercise EXAMINATION ARCHIVE WITH SOLUTIONS (NEET)|3 Videos

  • CHHAYA PUBLICATION|Exercise EXAMPLE|1 Videos

  • ATOM

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|18 Videos

Similar Questions

Explore conceptually related problems

A light bulb is rated 100 W for 220 V ac supply of 50 Hz. Calculate the resistance of the bulb ,

A light bulb is rated 100 W for 220 V ac supply of 50 Hz. Calculate the rms current throught the bulb

A 220 V - 60 W electric lamp os connected to 220 V supply line . Determine the resistance of the lamp in incandescent state .

Two bulbs are marked 220V - 100 W and 110 V- 100W. The ratio of the resistances of the two bulbs is

A 220 V -60W electric bulb is connected in 220 V line . What is the resistance of the filament of the bulb , when it is tured on ?

An electric bulb rated for 500W at 100 V is used in a circuit having a 200V supply. The resistance R that must be put in series with the bulb, so that the bulb delivers 500 W is

A sinusoidal voltage v=200 sin 314 t is applied to a resistor of 10Omega resistance. Calculate the frequency of the supply

An electric bulb marked as 50 W-200 V is connected across a 100 V supply. The present power of the bulb is

CHHAYA PUBLICATION-ALTERNATING CURRENT -CBSE SCANNER
  1. In an A.C. circuit, the potential difference across an inductance and ...

    Text Solution

    |

  2. For a given ac i=imsinomegat, show that the average power dissipated i...

    Text Solution

    |

  3. A light bulb is rated at 100 W for a 220V ac supply. Calculate the res...

    Text Solution

    |

  4. Why is the use of ac voltage preferred over dc voltage? Given two reas...

    Text Solution

    |

  5. A voltage V0sinomegat is applied to a series LCR circuit, Derive the e...

    Text Solution

    |

  6. Define the term 'quality factor' of resonance in series LCR circuit. W...

    Text Solution

    |

  7. Show that the average power consumed in an inductor L connected to an ...

    Text Solution

    |

  8. In a series LR circuit, XL=R and the power factor of the circuit is P1...

    Text Solution

    |

  9. State the principle of an ac generator.

    Text Solution

    |

  10. Explain briefly, with the help of labelled diagram, and obtain the exp...

    Text Solution

    |

  11. Draw a schematic diagram showing the nature of the alternating emf gen...

    Text Solution

    |

  12. When an ac source is connected to an ideal capacitor, show that the av...

    Text Solution

    |

  13. A bulb is connected in series with a variable capacitor and an ac sour...

    Text Solution

    |

  14. In a series LCR circuit connected to an ac source of voltage v=vmsinom...

    Text Solution

    |

  15. A derive 'X' is connected to an ac source V=V0sinomegat.The variation ...

    Text Solution

    |

  16. A derive 'X' is connected to an ac source V=V0sinomegat.The variation ...

    Text Solution

    |

  17. How does its impedance vary with frequency of the ac source ?Show grap...

    Text Solution

    |

  18. A derive 'X' is connected to an ac source V=V0sinomegat.The variation ...

    Text Solution

    |

  19. Find the value of the phase difference between the current and the vol...

    Text Solution

    |

  20. Without making any other change, find the value of the additional capa...

    Text Solution

    |