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Uttarakhand PMT Uttarakhand PMT Solved Paper-2007

  • question_answer
    In Ingen-Hausz experiment the wax melts up to 5 cm and 10 cm on bars A and B respectively. The ratio of the thermal conductivities of A and B is

    A)  1 : 2          

    B)  1 : 4

    C)  1:8          

    D)  1 : 16

    Correct Answer: B

    Solution :

     In Ingen-Hausz experiment \[k\propto {{(length)}^{2}}\] \[\Rightarrow \] \[\frac{{{k}_{1}}}{{{k}_{2}}}={{\left( \frac{5}{10} \right)}^{2}}=\frac{25}{100}\] \[\Rightarrow \] \[\frac{{{k}_{1}}}{{{k}_{2}}}=\frac{1}{4}\]


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