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JEE Main & Advanced Physics Transmission of Heat Question Bank Conduction

  • question_answer
    The length of the two rods made up of the same metal and having the same area of cross-section are 0.6 m and 0.8 m respectively. The temperature between the ends of first rod is \[{{90}^{o}}C\] and \[{{60}^{o}}C\]and that for the other rod is 150 and \[{{110}^{o}}C\]. For which rod the rate of conduction will be greater

    A)            First                                         

    B)            Second

    C)            Same for both                     

    D)            None of the above

    Correct Answer: C

    Solution :

                       \[\frac{{{Q}_{1}}}{t}=\frac{KA(90-60)}{0.6}=50\ KA\]            and \[\frac{{{Q}_{2}}}{t}=\frac{KA(150-110)}{0.8}=50\ KA\]


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