You have two rods of the same length and diameter but they are formed for different materials. The rods will be used to connect two regions of different temperature such that energy will transfer through the rods by heat. They can be connected in series, as in part (a) of the figure below, or in parallel, as in part (b). In which case is the rate of energy transfer by heat larger?

Engineering

Physics

Conduction of Heat

Question

You have two rods of the same length and diameter but they are formed for different materials. The rods will be used to connect two regions of different temperature such that energy will transfer through the rods by heat. They can be connected in series, as in part (a) of the figure below, or in parallel, as in part (b).

In which case is the rate of energy transfer by heat larger?

when the rods are in series

when the rods are in parallel

the rate is the same in both cases

cannot be determined

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In parallel, the rods present a larger area through which energy can transfer and a smaller length.