Home
Class 12
PHYSICS
A wire when connected to 220V mains supp...

A wire when connected to `220V` mains supply power dissipation `P_(1)`. Now the wire is cut into two equal pieces which are connected in parallel to the same apply power dissipation in this case is `P_(2)` then `P_(1) : P_(2)` is

A

1

B

4

C

2

D

3

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    DC PANDEY|Exercise Taking it together|142 Videos
  • CURRENT ELECTRICITY

    DC PANDEY|Exercise B. Assertion and reason|18 Videos
  • CURRENT ELECTRICITY

    DC PANDEY|Exercise Example|61 Videos
  • COMMUNICATION SYSTEM

    DC PANDEY|Exercise Subjective|11 Videos
  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Medical entrances gallery|25 Videos
DC PANDEY-CURRENT ELECTRICITY-Check point
  1. How many calories of heat will be approximately developed in a 210 W e...

    Text Solution

    |

  2. If in the circuit shown in Fig.7.55, power dissipation is 150 W , then...

    Text Solution

    |

  3. A wire when connected to 220V mains supply power dissipation P(1). Now...

    Text Solution

    |

  4. Two electric bulbs one, if 200 V-40 W and other 200 V-100 W are connec...

    Text Solution

    |

  5. One kilowatt hour is equal to

    Text Solution

    |

  6. 3 identical bulbs are connected in series and these together dissipate...

    Text Solution

    |

  7. Two bulbs are working in parallel order. Bulb A is brighter than bulb ...

    Text Solution

    |

  8. Electric bulb 50 W - 100 V glowing at full power are to be used in par...

    Text Solution

    |

  9. Some electric bulbs are connected in series across a 220 V supply in a...

    Text Solution

    |

  10. In the circuit shown, A and V are ideal ammeter and voltmeter respecti...

    Text Solution

    |

  11. The net resistance of a volmeter should be large to ensure that

    Text Solution

    |

  12. Two galvanometers A and B require 3 mA and 6 mA respectively, to produ...

    Text Solution

    |

  13. An ammeter A, a voltmeter V and a resistance R are connected as shown ...

    Text Solution

    |

  14. In the adjoining circuit, the e.m.f. of the cell is 2 volt and the int...

    Text Solution

    |

  15. What is the reading of voltmeter in the following figure ?

    Text Solution

    |

  16. A galvanometer of resistance 25 Omega gives full scale deflection for ...

    Text Solution

    |

  17. An ammeter and a voltmeter are joined in sereis to a cell. Their readi...

    Text Solution

    |

  18. In the circuit shown in the figure, the voltmeter reading is

    Text Solution

    |

  19. The shunt required for 10% of main current to be sent through the movi...

    Text Solution

    |

  20. The potential difference across the 100 Omega resistance in the follow...

    Text Solution

    |