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Manipal Medical Manipal Medical Solved Paper-2011

  • question_answer
    The load versus elongation graph of four wires of same length and of the same material is shown in figure. The thinnest wire is represented by the line

    A)  OA              

    B)  OB

    C)  OC             

    D)  OD

    Correct Answer: A

    Solution :

     \[Y=\frac{F\times l}{A\times \Delta l}\]or \[\frac{F(\operatorname{lo}ad)}{\Delta l(elongation)}=\frac{YA}{l}\] or     \[slope\propto A\] or     \[slope\propto {{r}^{2}}\] For thinnest wire slope is minimum. ie, wire OA is thinnest.


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