Home
Class 12
PHYSICS
If a copper wire of length 0.9 m and cr...

If a copper wire of length 0.9 m and cross section `1mm^(2)` is stretched by a load of 1 kg then the extension in the wire will be
`(Y_(c )=1.2xx10^(11)N//m^(2) and g=10m//s^(2))`

A

0.013 mm

B

0.075 mm

C

0.11 mm

D

0.13 mm

Text Solution

Verified by Experts

The correct Answer is:
B
`e=(FL)/(Ay)=(1xx10xx0.9)/(10^(-6)xx1.2xx10^(11))`
`=(3)/(4) xx 10^(-4) = 0.75 xx 10^(-4)m`
`=0.075 mm`.
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 diameter 1 mm, and length 2 m is stretched by applying a force of 2.2 kg wt. the extension produced in the wire is

A copper wire of length 4.0 mm and area of cross-section 1.2 cm^(2) is stretched with a force of 4.8 xx 10^(3) N. If Young's modulus for copper is 1.2xx10^(11) N//m^(2) , the increases in the length of the wire will be

A steel wire of length 2.5 m and area of cross section 1.25 mm^(2) , when it is stretched by a force of 40 N and Y for steel is 2xx10^(11)N//m^(2) . The extension produced in a steel wire is

A wire 3 m is length and 1 mm is diameter at 30^(@) C is kept in a low temperature at -170^(@)C and is stretched by hanging a weight of 10 kg at one end. The change in length of the wire is [Take, Y=2xx10^(11) N//m^(2), g=10 m//s^(2) and alpha =1.2 xx 10^(-5) //""^(@)C ]

A steel wire of length 5 m and area of cross-section 4 mm^(2) is stretched by 2 mm by the application of a force. If young's modulus of steel is 2xx10^(11)N//m^(2), then the energy stored in the wire is

A wire of length 10 m and cross-section are 10^(-6) m^(2) is stretched with a force of 20 N. If the elongation is 1 mm, the Young's modulus of material of the wire will be

Two wires one of copper and other of iron having same cross-section area and lengths 2 m and 1.5 m respectively are fastened end and stretched by a load 10 N. If copper wire is stretched by 2mm then find the total extension of combined wire, Y_(Cu)=1xx10^(11)N//m^(2) and Y_(Fe)=3xx10^(11)N//m^(2) .

A 4m long copper wire of cross sectional are a 1.2cm^(2) is strechted by a force of 4.8xx10^(3)N . if Young's modulus for copper is Y = 1.2xx10^(11) M//m^(2) , the increases in length of wire and strain energy per unit volume are

Two wires one of copper and other of steel having same cross-sectionl area end to end and strecteched by a load M. Ifcopper wire Is stretched by 1 mm, the total extnsion of the combined wire is (Givwen, Young's are Y_("copper")= 1 xx 10^(11) N//m^(2), and Y_("steel") = 2 xx 10^(11) N//m^(2))

NIKITA PUBLICATION-ELASTICITY-MCQ
  1. A steel ring of radius r and cross section area A is fitted on to a wo...

    Text Solution

    |

  2. The bulk modulus of water is 2.0xx10^(9) N//m^(2). The pressure requir...

    Text Solution

    |

  3. If a copper wire of length 0.9 m and cross section 1mm^(2) is stretch...

    Text Solution

    |

  4. An area of cross-section of rubber string is 2 cm^(2). It length is do...

    Text Solution

    |

  5. A wire of area of cross-section 10^(-6) m^(2) is increased in length b...

    Text Solution

    |

  6. If a rubber ball is taken to 100 m deep in a lake and its volume chang...

    Text Solution

    |

  7. A rubber cord of cross-sectional area 2 cm^(2) has a length of 1 m. Wh...

    Text Solution

    |

  8. The isothermal Bulk modulus of an ideal gas at pressure P is

    Text Solution

    |

  9. If breaking stress of a wire of length L and radius of cross-section r...

    Text Solution

    |

  10. Length of an elastic string is x then tension 5N is applied and its le...

    Text Solution

    |

  11. A cable that can support a load W is cut into two equal parts .T he ma...

    Text Solution

    |

  12. A steel wire of diameter 1 mm, and length 2 m is stretched by applying...

    Text Solution

    |

  13. A steel wire of diameter 1 mm, and length 2 m is stretched by applying...

    Text Solution

    |

  14. A steel wire of diameter 1 mm, and length 2 m is stretched by applying...

    Text Solution

    |

  15. Two wires have diameters in the ratio 2:1, lengths in the ratio 4:3 an...

    Text Solution

    |

  16. Two similar wires under the same load yield elongation of 0.1 mm and 0...

    Text Solution

    |

  17. A liquid of volume 4 litere is subjected to additional pressure of 1.2...

    Text Solution

    |

  18. The shearing strain produced in a block of metal subjected to a sheari...

    Text Solution

    |

  19. A 20 N stone is suspended from a wire and its length changes by 1%. I...

    Text Solution

    |

  20. A wire of length 1 m and its area of cross-section is 1 cm^(2) and Yo...

    Text Solution

    |