Four cylindrical rods of same material with length and radius (l,r),(2l,r),(2l,r) and (l,2r) are connected between two reservoirs at `0^@C` and `100^@C`. Find the ratio of the maximum to minimum rate of cunduction in them.

Four cylindrical rods of same material with length and radius (l,r),(2

1.	Four cylindrical rods of same material with length and radius (l,r),(2l,r),(2l,r) and (l,2r) are connected between two reservoirs at `0^@C` and `100^@C`. Find the ratio of the maximum to minimum rate of cunduction in them.
Answer» Rate of conduction `Rprop(r^2)/(l)` The ratio of conduction in them is `(r^2)/(l):(r^2)/(2l):(2r^2)/(l):(4r^2)/(l)`, i.e. `2:1:4:8` So, the ratio of maximum to minimum conduction rate is `8:1`

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Four cylindrical rods of same material with length and radius (l,r),(2l,r),(2l,r) and (l,2r) are connected between two reservoirs at `0^@C` and `100^@C`. Find the ratio of the maximum to minimum rate of cunduction in them.

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