Home
Class 12
PHYSICS
A brass wire of length 5 m and cross sec...

A brass wire of length 5 m and cross section area `10^(-6) m^(2)` hung from rigid support with brass weight of volume `10^(-3)m^(3)` hanging from other end. Then the decrease in length of the wire when brass weight is completely immersed in water is,
`(g=10m//s^(2), Y_("brass")=10^(11)N//m^(2), rho_(w)=10^(3)kg//m^(3))`

A

`5xx10^(-4)m`

B

`3xx10^(-4)m`

C

`4xx10^(-4)m`

D

`2xx10^(-2)m`

Text Solution

Verified by Experts

The correct Answer is:
A
`l_(1)-l_(2)=(F_(1)-F_(2))(L)/(Ay)=(v rho gL)/(AY)`
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    NIKITA PUBLICATION|Exercise Multiple Choice Questions|314 Videos

  • ELECTROMAGNETIC INDUCTION

    NIKITA PUBLICATION|Exercise MCQs|431 Videos

Similar Questions

Explore conceptually related problems

A steel wire of length 7 m and cross section 1 mm^(2) I suspended from a rigid support, with a steel weight of volume 10^(3) cm^(3) hanging from its other end. Find the decrease in the length of the wire when the steel weight is completely immersed in water. Y_("steel") = 2xx 10^(11) N//m^(2) density of water = 10^(3) kg//m^(3) ]

A brass wire of cross-sectional area 2mm^(2) is suspended from a rigid support and a body of volume 100cm^(2) is attached to its other end. If the decrases in the length of the wire is 0.11mm , when the body is completely immersed in water, find the natural length of the wire.

A wire of length 3 m diameter 0.4 mm and young's modulus 8xx10^(10) N//m^(2) is suspended from a point and supports a heavy cylinder of volume 10^(-3) m^(3) at its lower end . Find the decrease in length when the metal cylinder is immersed in a liquid of density 800 kg //m^(3) .

A 0.5 kg block of brass (density 8xx103Kg m^(-3) ) is suspended from a string. What is the tension in the string if the block is completely immersed in water? (g =10ms^(-2))

A copper wire and a steel wire of same length and same cross-section are joined end to end. The compositive wire is hung from a rigid support and a load is suspended form the free end. The increase in length of the compositive wire is 4 mm. The increase in copper wire will be (Y_(copper)=1.2xx10^(11)N//m^(2),Y_(steel)=2xx10^(11)N//m^(2))

A steel wire fo length 5m and cross-sectional area 2xx10^(-6)m^(2) streches by the same amount as a copper wire of length 4m and cross sectional area of 3xx10^(-6) m^(2) under a given load. The ratio of young's mouduls of steel to that of copper is

A wire of length 1 m and area of cross section 2xx10^(-6)m^(2) is suspended from the top of a roof at one end and a load of 20 N is applied at the other end. If the length of the wire is increased by 0.5xx10^(-4)m , calculate its Young’s modulus (in 10^(11)N//m^(2)) .

A brass of length 2 m and cross-sectional area 2.0 cm^(2) is attached end to end to a steel rod of length and cross-sectional area 1.0 cm^(2) . The compound rod is subjected to equal and oppsite pulls of magnitude 5 xx 10^(4) N at its ends. If the elongations of the two rods are equal, the length of the steel rod (L) is { Y_(Brass) = 1.0 xx 10^(11) N//m^(2) and Y_(steel) = 2.0 xx 10^(11) N//m^(2)

Calculate the force required to increase the length of a steel wire of cross- sectional area 10^(-6)m^(2) by 0.5% given: Y_(("for steel"))=2xx10^(11)N-m^(2)

A wire of area of cross section 1xx10^(-6)m^(2) and length 2 m is stretched through 0.1 xx 10^(-3)m . If the Young's modulus of a wire is 2xx10^(11)N//m^(2) , then the work done to stretch the wire will be

NIKITA PUBLICATION-ELASTICITY-MCQ
  1. A spherical ball contracts in volume by 0.01% when subjected to a norm...

    Text Solution

    |

  2. The constant forces are applied in opposite directions on upper and lo...

    Text Solution

    |

  3. A brass wire of length 5 m and cross section area 10^(-6) m^(2) hung ...

    Text Solution

    |

  4. An alumminium rod and steel wire of same length and cross-section are ...

    Text Solution

    |

  5. A uniform metal wire has a length of 2m and diameter 2 cm. When it is ...

    Text Solution

    |

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

    Text Solution

    |

  7. A solid sphere of radius R made of a material of bulk modulus K is sur...

    Text Solution

    |

  8. A thick rope of density rho and length L is hung from a rigid support....

    Text Solution

    |

  9. The forces of 10^(6) N each are applied on opposite directions on up...

    Text Solution

    |

  10. A steel wire of uniform cross-section 1 mm^(2) is heated to 70^(@)C an...

    Text Solution

    |

  11. The longitudinal stain in a metal bar is 0.05. If the Poison's ratio f...

    Text Solution

    |

  12. If the values of Y and eta for a material are 2xx10^(11) pascal and ...

    Text Solution

    |

  13. If Y is the Young's modulus of a wire of cross sectional area A, then ...

    Text Solution

    |

  14. If stress is 10^(12) times the strain produced in a wire, then its You...

    Text Solution

    |

  15. A wire of length 10 m and cross-section are 10^(-6) m^(2) is stretched...

    Text Solution

    |

  16. If same tensile force is applied on two wires, there will an extension...

    Text Solution

    |

  17. Two person pull a rope towards themselves. Each person exerts a force ...

    Text Solution

    |

  18. The length of a metal wire is l when the tension is F and x l when the...

    Text Solution

    |

  19. A force of 100 N increases the length of a given wiere by 0.1 mm. Then...

    Text Solution

    |

  20. A mass 'm' kg is whirled in a vertical plane by tying it at the end ...

    Text Solution

    |