11.10 Angstrom's Experiment
Angstrom determined the conductivity of the material of a bar by periodically heating and cooling it. The bar was heated and cooled periodically by passing steam and water at regular intervals through a chamber at one end of the bar as shown in Fig. 11.19.
Fig. 11.19 Schematic representation of Angstrom's experiment
In this way, the temperature at points along the bar fluctuate periodically and on account of surface radiation the temperature amplitude diminishes as the distance from the region of supply increases.
The bar must be chosen so that it is sufficiently long to allow us to neglect the effect of terminal ...
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