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CMC Medical CMC-Medical VELLORE Solved Paper-2011

  • question_answer
    The wires A and B are of same material and same length but their radii are in the ratio 1 : 2. They are stretched by the same force. Strain produced in two wires is

    A)  2 : 1                                      

    B)  1 : 2

    C)  1 : 4                                      

    D)  4 : 1

    E)  1 : 8

    Correct Answer: D

    Solution :

                                    \[{{r}_{1}}:{{r}_{2}}=1:2\] Ratio of strains \[={{\left( \frac{{{r}_{2}}}{{{r}_{1}}} \right)}^{2}}\] \[={{\left( \frac{2}{1} \right)}^{2}}=\frac{4}{1}\] \[=4:1\]


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