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EAMCET Medical EAMCET Medical Solved Paper-2008

  • question_answer
    When a wire is subjected to a force along its length, its length increases by 0.4% and its radius decreases by 0.2%. Then the Poissons ratio of the material of the wire is

    A)  0.8                                        

    B)  0.5

    C)  0.2                                        

    D)  0.1

    Correct Answer: B

    Solution :

                     Poissons ratio ct is the ratio of fractional change in diameter to fractional change in  length.                                 Thus,         \[\sigma =\frac{\Delta r/r}{\Delta l/l}\]     where r is the radius of the wire.                 \[\therefore \]  \[\sigma =\frac{0.2}{0.4}\]                                 \[=0.5\]


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