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AP EAMCET2002PhysicsMechanical Properties of Solids

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

Options

  1. A3 %
  2. B2.5 %
  3. C1 %
  4. D0.5 %

Correct answer

B. 2.5 %

Step-by-step solution

aligned & Poission's ratio = R / R l / l & l l = R R 1 & = R R 1 0.4 & Increase in length = ( R R 1 0.4 ) 100 & = 2 2 1 0.4 =2.5 % & aligned

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