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NEET Sample Paper NEET Sample Test Paper-55

  • question_answer
    Two uniform brass rods A and B of length \[\ell \] and 1C. and radii 2r and r respectively are heated to the same temperature. The ratio of the increase in the volume of A to that of B is

    A) 1 : 1                 

    B) 1 : 2

    C) 2 : 1                             

    D) 1 : 4

    Correct Answer: C

    Solution :

    \[\frac{\Delta {{V}_{A}}}{\Delta {{V}_{B}}}=\frac{{{V}_{A}}\gamma \Delta T}{{{V}_{B}}\gamma \Delta T}\,\,=\,\,\frac{4\pi {{r}^{2}}\ell }{4\pi {{r}^{2}}(2\ell )}=\,\,\frac{2}{1}\]


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