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Question: Answered & Verified by Expert
The length of the two rods made up of the same metal and having the same area of cross-section are $0.6 \mathrm{~m}$ and $0.8 \mathrm{~m}$ respectively. The temperature between the ends of first rod is $90^{\circ} \mathrm{C}$ and $60^{\circ} \mathrm{C}$ and that for the other rod is 150 and $110^{\circ} \mathrm{C}$. For which rod the rate of conduction will be greater
PhysicsThermal Properties of MatterJEE Main
Options:
  • A First
  • B Second
  • C Same for both
  • D None of the above
Solution:
2106 Upvotes Verified Answer
The correct answer is: Second
The rate of heat flow in a rod is given by the formula $\mathrm{H}=\mathrm{kA}((\mathrm{T} 1-\mathrm{T} 2) / \mathrm{L})$
Rate of heat transfer is directly proportional to difference in temperature.

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