Home
Class 12
PHYSICS
A wire of cross-sectional area 3 mm^(2) ...

A wire of cross-sectional area `3 mm^(2)` is first stretched between two fixed points at a temperature of `20^(@)C`. Determine the tension when the temperature falls to `10^(@)C` Coefficient of linear expansion `alpha=10^(-5).^(@)C^(-1) and Y =2 xx10^(11) N//m^(2)`

A

20 N

B

30 N

C

60 N

D

120 N

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY

    MOTION|Exercise EXERCISE -2|25 Videos
  • CURRENT ELECTRICITY

    MOTION|Exercise EXERCISE -4 (Level -II)|25 Videos
  • ELASTICITY AND THERMAL EXPANSION

    MOTION|Exercise Exercise - 4 (Level-II)|11 Videos
MOTION-ELASTICITY-EXERCISE -3
  1. When a force is applied on a wire of uniform cross-sectional area 3xx1...

    Text Solution

    |

  2. A force of 10^3 newton, stretches the length of a hanging wire by 1 mi...

    Text Solution

    |

  3. A wire of cross-sectional area 3 mm^(2) is first stretched between two...

    Text Solution

    |

  4. For steel the breaking stressis 6xx10^(6)N//m^(2) and the density is 8...

    Text Solution

    |

  5. The units of modulus of rigidity are

    Text Solution

    |

  6. A 2m long rod of radius 1 cm which is fixed from one end is given a tw...

    Text Solution

    |

  7. A ball falling in a lake of depth 200 m shows 0.1% decrease in its vol...

    Text Solution

    |

  8. An iron wire of length 4 m and diameter 2 mm is loaded with a weight o...

    Text Solution

    |

  9. The dimensional formula for young's modulus is

    Text Solution

    |

  10. A fixed volume of iron is drawn into a wire of length l. The extension...

    Text Solution

    |

  11. A mass of 0.5 kg is suspended from wiere, then length of wire increase...

    Text Solution

    |

  12. If the strain in a wire is not more than 1//1000 and Y =2xx10^(11)N//m...

    Text Solution

    |

  13. A wire of length L and radius r is fixed at one end. When a stretching...

    Text Solution

    |

  14. How much force is required to produce an increase of 0.2 % in the leng...

    Text Solution

    |

  15. If the interatomic spacing in a steel wire is 2.8xx10^(-10)m. And Y("s...

    Text Solution

    |

  16. The load versus elongation graph for four wires of the same material a...

    Text Solution

    |

  17. The mean distance between the atoms of iron is 3xx10^(-10) m and inter...

    Text Solution

    |

  18. The area of cross section of a steel wire (Y=2.0 xx 10^(11) N//m^(2)) ...

    Text Solution

    |

  19. For a given material the Young's modulus is 2.4 times that of its ri...

    Text Solution

    |

  20. The diameter of a brass rod is 4 mm and Young's modulus of brass is 9 ...

    Text Solution

    |