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प्रश्न
Why does the electrical conductivity of semiconductors increase with rise in temperature?
उत्तर
The gap between conduction band and valence band is small in semiconductors (Figure), therefore, some electrons from the valence band can jump to the conduction band and show some conductivity band. With rise in temperature more electrons can jump to the conduction band. Thus, electrical conductivity of semiconductors increases with rise in temperature.
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