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A wire of length 1m and radius 1mm is su...

A wire of length 1m and radius 1mm is subjected to a load. The extension is 'x'. The wire is melted and then drawn into a wire of square cross-section of side 1mm. What is its extension under the same load?

A

`pi^2 x `

B

`pi x^2`

C

`pi x `

D

`pi//x `

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • A wire of length 1 m and radius 1mm is subjected to a load. The extension is 'x'. The wire is melted and then drawn into a wire of square cross-section of side 1 mm. What is its extension under the same load?

    A
    `pi^(2) x`
    B
    `pix^(2)`
    C
    `pi x`
    D
    `pi//x`

  • A wire of length 1 m and radius 1mm is subjected to a load. The extension is 'x'. The wire is melted and then drawn into a wire of square cross-section of side 1 mm. What is its extension under the same load?

    A
    `pi^(2) x`
    B
    `pix^(2)`
    C
    `pi x`
    D
    `pi//x`

  • A brass wire of diameter 1 mm and of length 2m is stretched by applying a force of 20N. Then the stress in the wire is

    A
    `2.546xx10^(7)N//m^(2)`
    B
    `3.146xx10^(7)N//m^(2)`
    C
    `2.346xx10^(7)N//m^(2)`
    D
    `2.246xx10^(7)N//m^(2)`

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