Home
Class 12
PHYSICS
The length of a wire is doubled by pulli...

The length of a wire is doubled by pulling it.Find the new resistance.

A

2 R

B

4 R

C

R

D

0.25 R

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • TEXTUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|507 Videos

  • STRUCTURE OF NUCLEUS

    MODERN PUBLICATION|Exercise EXERCISE|47 Videos

  • TEXUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|195 Videos

Similar Questions

Explore conceptually related problems

The length of a wire is doubled. Its conductance will

A sonometer wire is vibrating in resonance with a tuning fork.Keeping the tension applied same,the length of the wire is doubled.Under what conditions would the tuning fork still be in resonance with the wire?

A wire of resistance 1 Omega is stretched to double its length. What is the new resistance?

What happens to the dirft velocity (v_d) of electrons and to the resistance (R), if the length of a aconductor is doubled (keeping potential difference unchanged)?

A wire has a resistance of 90 Omega and it is cut into three pieces having equal lengths. If these are now connected in parallel, find the resistance of the combination so formed.

MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
  1. The filament of electric bulb is made of .............. .

    Text Solution

    |

  2. The length of a wire is doubled. Its conductance will

    Text Solution

    |

  3. The length of a wire is doubled by pulling it.Find the new resistance.

    Text Solution

    |

  4. Which of the following has negative temperature coefficient of resista...

    Text Solution

    |

  5. Which of the following has a negative temperature coefficient?

    Text Solution

    |

  6. A wire has a resistance of 3.1 Omega at 30^@C and a resistance of 4....

    Text Solution

    |

  7. A wire has a resistance of 3.1Omega at 30^@C and a resistance of 4.5Om...

    Text Solution

    |

  8. Three bulbs of electric powers 40 W, 60 W and 100 W are connected in s...

    Text Solution

    |

  9. A 30 V . 90 W lamp is to be operated on a 120 V d.e. line for proper g...

    Text Solution

    |

  10. If a power of 100 W is being supplied across a potential difference of...

    Text Solution

    |

  11. A 10Omega electric heater operates on a 110 V line. The rate at which ...

    Text Solution

    |

  12. On 220 V supply, a heater heats a volume of water in 5 minutes time. O...

    Text Solution

    |

  13. Two heater coils separately take 10 minutes and 5 minutes to boil a ce...

    Text Solution

    |

  14. Five equal resistors, when connected in seires, dissipated 5 W power, ...

    Text Solution

    |

  15. If a wire of resistance 20 Omega is overed with ice and a voltage of 2...

    Text Solution

    |

  16. A wire is cut into 4 pieces, which are put together by sides to obtain...

    Text Solution

    |

  17. A student has 10 resistors each of resistance r, From the given resist...

    Text Solution

    |

  18. Which of the following is a secondary cell?

    Text Solution

    |

  19. The internal resistance of a cell is the resistance of

    Text Solution

    |

  20. The internal resistance of a cell of e.m.f. 2 V is 0.1 Omega. It is co...

    Text Solution

    |