# Working with rods of different thermal conductivities

Which of the following cylindrical rods of the same material with its ends at the same steady difference of temperature will conduct maximum heat ?

1. Lenght 100 cm & radius 1 cm

2. length 200 cm & radius 1 cm

3. length 400 cm & radius 2 cm

4. length 100 cm & radius 2 cm

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#### Solution Preview

We have, the quantity of heat conducted

Q = K A (t1 - t2)/d

(t1 - t2) is the temperature difference existing ...

#### Solution Summary

Very detail answer with easy to understand steps. It will enable you to do similar problems yourself.

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