Home
Class 12
PHYSICS
An electric bulb rated for 500W at 100 V...

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

`30Omega`

B

`20Omega`

C

`40Omega`

D

`35Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    PATHFINDER|Exercise QUESTION BANK|39 Videos

  • ELECTRIC CHARGES & FIELDS

    PATHFINDER|Exercise QUESTION BANK|45 Videos

Similar Questions

Explore conceptually related problems

An electric bulb rated for 500 watt at 100 volt is connected to a 200 volt supply line . How much resistance has to be joined in seresies with the bulb so that , the bulb delivers 500 watt ?

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

An electric heater is marked 110 V - 550 W and it is to be used in 200 v mains .How much resistance is to be added in series the heater ?

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

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

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

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 ?

PATHFINDER-CURRENT ELECTRICITY - I AND II-QUESTION BANK
  1. In the circuit shown the current through 2 Omega resistance is

    Text Solution

    |

  2. A current of 2 A flows through a 2 Omega resistor when connected acros...

    Text Solution

    |

  3. An electric bulb rated for 500W at 100 V is used in a circuit having a...

    Text Solution

    |

  4. 100W bulb B1 and two 60 W bulbs B2 and B3 are connected to a 250 V sou...

    Text Solution

    |

  5. In the circuit shown in figure the heat produced in the 5Omega resisto...

    Text Solution

    |

  6. The equivalent resistance of the network shown in figure between the p...

    Text Solution

    |

  7. The equivalent resistance of the network shown in figure between the p...

    Text Solution

    |

  8. In the circuit shown in the figure, R = 55Omega, the equlvalent resist...

    Text Solution

    |

  9. For the given whetatstone bridge, the balance is obtained, if the foll...

    Text Solution

    |

  10. A potentiometer has a resistance wire of 4 m length and resistance 4 O...

    Text Solution

    |

  11. An ammeter is to be constructed which can read currents up to 2A. If t...

    Text Solution

    |

  12. The potentiometer wire AB shown in figure is 50 cm long. When AD=30 cm...

    Text Solution

    |

  13. The cold junction of a thermo couple is maintained at 30^@C. No thermo...

    Text Solution

    |

  14. For a thermo couple, the neutral temperature is 270^@C and the tempera...

    Text Solution

    |

  15. Thermo couple is a device for the measurement of

    Text Solution

    |

  16. For a thermo couple , the temperature of inversion is that temperature...

    Text Solution

    |

  17. Which of the following is an electrolyte

    Text Solution

    |

  18. The internal resistance of a primary cell is 4 Omega. If generates a c...

    Text Solution

    |

  19. If 100 KWh of energy is consumed at 33 V is a copper voltameter what i...

    Text Solution

    |

  20. In an electroplating experiment mg of silver is deposited when 4A of c...

    Text Solution

    |