Measuring the temperature-dependency of a semiconductor resistor
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Experiment description
The temperature-dependency of the specific resistance R is a simple test for models of electric conductivity in conductors and semiconductors. In electrical conductors, R rises with the temperature, as the collisions of the quasi-free electrons from the conduction band with the incomplete atoms of the conductor play an increasing role. In semiconductors, on the other hand, the resistance decreases as the temperature increases since more and more electrons move from the valence band to the conduction band, thus contributing to the conductivity.
