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JEE Main & Advanced Physics Wave Mechanics Question Bank Self Evaluation Test - Mechanical Properties of Solids

  • question_answer
    A light rod of length 2m suspended from the ceiling horizontally by means of two vertical wires of equal length. A weight W is hung from a light rod as shown in figure. The rod hung by means of a steel wire of cross-sectional area \[{{A}_{1}}=0.1c{{m}^{2}}\] and brass wire of cross sectional area\[{{A}_{2}}=0.2c{{m}^{2}}\]. To have equal stress in both \[{{T}_{1}}/{{T}_{2}}=\] 

    A) 1/3

    B) 1/4               

    C) 4/3

    D) 1/2          

    Correct Answer: D

    Solution :

    [d] For stress to be equal, \[\frac{{{T}_{1}}}{{{A}_{1}}}=\frac{{{T}_{2}}}{{{A}_{2}}}\] \[\therefore \,\,\,\frac{{{T}_{1}}}{{{T}_{2}}}=\frac{{{A}_{1}}}{{{A}_{2}}}=\frac{1}{2}\]


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