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  1. Heat is generated uniformly in a long solid cylindrical rod (diameter =10 mm) at the rate of 4 × 107 W/m3. The thermal conductivity of the rod material is 25 W/mK. Under steady state conditions, the temperature ditference between the centre and the surface of the rod is 1°C.
    1. -10°C
    2. 10°C
    3. -11°C
    4. -9°C
Correct Option: A

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