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Grade: 12th pass
        
Four rods with different radii r and length l are connected to two reservoirs at different temperature. Which one of them will conduct most heat
5 months ago

Answers : (1)

Arun
22779 Points
							

The heat conduction per unit time is given by,
dq/dt = k(t₁ - t₂)A/l
=> dq/dt = k(t₁ - t₂)πr²/l
=> dq/dt ∝ r²/l
hence we can see that the heat conduction is directly proportional to the radius and inversely proportional to the length.
So heat conduction is maximum when r is maximum and l is minimum.
Hence the rod with maximum radius and minimum length will conduct maximum heat.
5 months ago
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