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JEE Main & Advanced Physics Transmission of Heat Question Bank Topic Test - Transmission Of Heat

  • question_answer
    Twelve conducting rods form the riders of a uniform cube of side ‘l’. If in steady state, B and H ends of the rod are at \[100{}^\circ C\] and \[0{}^\circ C\]. Find the temperature of the junction ‘A’:

    A) \[{{80}^{o}}C\]

    B) \[{{60}^{o}}C\]

    C) \[{{40}^{o}}C\]

    D) \[{{70}^{o}}C\]

    Correct Answer: B

    Solution :

    [b] \[\frac{100-0}{5/6R}=\frac{100-T}{R/3}\] \[\Rightarrow \]   \[\frac{100\times 6}{5R}=\frac{(100-T)3}{R}\] \[\Rightarrow \]   \[40=100-T\] \[\Rightarrow \]   \[T={{60}^{o}}C\]


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