MHT CET 2024 Physics question
Rate of flow of heat through a cylindrical rod is 'H'. The temperature at the ends of the road are 'T' and 'T'. If all the dimensions of the road become double and the temperature difference remains the same, the rate of flow of heat becomes 'H'. then
Answer: (B)
Solution
Rate of heat conduction: with . Doubling all dimensions makes the radius (so ) and the length . With unchanged:
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