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How does the conductivity change with ri...

How does the conductivity change with rise of temperature in semi-conductors?

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All semiconductors behave like insulators at `0K` because at `0K` all the valence bands are completely filled and no free electron is available. As the temperature of the semiconductor is increased, the electrons jump to conduction band due to thermal agitation and the conductivity of the semiconductor is increased, With further increase in temperature more and more electrons shift to conduction band, hence the conductivity of the semiconductor increases with rise in temperature.
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