The Poisson’s ratio of a material is 0.4. If a force is applied to a wire of this material, there is decrease of cross-sectional area by 2%. The percentage increase in its length is |
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a) |
3% |
b) |
2.5% |
c) |
1% |
d) |
0.5% |

The Poisson’s ratio of a material is 0.4. If a force is applied to a wire of this material, there is decrease of cross-sectional area by 2%. The percentage increase in its length is |
|||||||

a) |
3% |
b) |
2.5% |
c) |
1% |
d) |
0.5% |

1 Answer - 5876 Votes

3537

**(b)**

Poisson’s ratio,

Area

Differentiating

As

= 2

Given

= 2=2

Given 0.4

Or

= 2.5

= 2.5%