Home
Class 12
PHYSICS
The resistance of a wire is 'R' ohm. If ...

The resistance of a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length, its new resistance will be: 

A

`(R)/(n^(2))`

B

`nR`

C

`(R )/(n)`

D

`n^(2)R`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE - III|73 Videos
  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE - IB|44 Videos
  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise PROBLEMS (LEVEL-II)|26 Videos
  • DUAL NATURE OF RADIATION AND MATTER

    AAKASH SERIES|Exercise PRACTICE EXERCISEX|44 Videos

Similar Questions

Explore conceptually related problems

The resistance of the wire is 121 ohm. It is divided into .n. equal parts and they are connected in parallel, then effective resistance is 1 ohm. The value of .n. is

A uniform wire of resistance R is uniformly compressed along its length, unitl its radius becomes n times the original radius. Now resistance of the wire becomes.

Resistance of a wire is 8Omega . It is drawn in such away that it experiences a longitudinal strain of 400 % . The new resistance is

A wire of length l is drawn such that its diameter is reduced to half of its original diameter. If the initial resistance of the wire were 10Omega , its new resistance would be

If a copper wire is stretched to increase its length by 0.1% . Then percentage of increase in its resistance will be

A wire of resistance 18 ohm is drawn until its radius reduces 1//2^(th) of its original radius then resistance of the wire is

AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE - II
  1. A 6Omega resistance is connected in the left gap of a meter bridge. In...

    Text Solution

    |

  2. Two equal resistances are connected in the gaps of a metre bridge. If ...

    Text Solution

    |

  3. When un known resistance and a resistance of 4Omega are used in the le...

    Text Solution

    |

  4. Two unknown resistances x and y are connected in the left and right ga...

    Text Solution

    |

  5. When two resistances (50)/(3)Omega and unknown resistance are connecte...

    Text Solution

    |

  6. In a meter bridge experiment Two unknown resistances X and Y are conne...

    Text Solution

    |

  7. The emf of a battery A is balanced by a length of 80cm on a potentio m...

    Text Solution

    |

  8. The balancing lengths of potentiometer wire are 800 cm and 600cm when ...

    Text Solution

    |

  9. The ratio of potential gradients is 1:2, the resistance of two potenti...

    Text Solution

    |

  10. When 6 identical cells of no internal resistance are connected in seri...

    Text Solution

    |

  11. The balancing length for a cell is 560cm in a potentiometer experiment...

    Text Solution

    |

  12. The resistivity of a potentiometer wire is, if the area of cross secti...

    Text Solution

    |

  13. A potentiomete wire of 10m length and 20 Ohm resistance is connected i...

    Text Solution

    |

  14. A potentiometer has a wire of 100cm length and its resistance is 10 Oh...

    Text Solution

    |

  15. The length of potentiometer wire is 200 cm and the emf of standard cel...

    Text Solution

    |

  16. The emf of a cell is 2V and its internal resistance is 2 ohm. A resist...

    Text Solution

    |

  17. A cell in secondary circuit gives null deflection for 2.5 m length of ...

    Text Solution

    |

  18. A potentiometer wire of length L and a resistance r are connected in s...

    Text Solution

    |

  19. The resistance of a wire is 'R' ohm. If it is melted and stretched to ...

    Text Solution

    |

  20. A set of 'n' equal resistors, of value 'R' each, are connected in seri...

    Text Solution

    |