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A steel wire of 2mm in diameter is stret...

A steel wire of `2mm` in diameter is stretched by applying a force of `72N`. Stress in the wire is

A

`2.29xx10^(7) N//m^(2)`

B

`1.7xx10^(7) N//m^(2)`

C

`3.6xx10^(7) N//m^(2)`

D

`0.8xx10^(7) N//m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
Stress `= (F)/(A) = (F)/(pi r^(2))`
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Knowledge Check

  • A steel wire of diameter 1 mm, and length 2 m is stretched by applying a force of 2.2 kg wt. the strain is

    A
    `0.7xx10^(-4)`
    B
    `1.4xx10^(-4)`
    C
    `1.9xx10^(-5)`
    D
    `2.8xx10^(-4)`

  • 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
    `2.8xx10^(-4)m`
    B
    `2.8xx10^(-6)m`
    C
    `1.4xx10^(-4)m`
    D
    `1.4xx10^(-6)m`

  • A steel wire of diameter 1 mm, and length 2 m is stretched by applying a force of 2.2 kg wt. The stress is (g=10m//s^(2), Y=2xx10^(11)N//m^(2))

    A
    `7xx10^(7)N//m^(2)`
    B
    `3xx10^(6)N//m^(2)`
    C
    `21xx10^(8)N//m^(2)`
    D
    `28xx10^(6)N//m^(2)`
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