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Why does a semicondctor act as an insulator at 0'k and why its conductivity increases with increasing temperature?
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Answer Posted / fahma
At zero kelvin kinetic energy of the particles is zero. So velocity is zero. Means no motion of electrons.therefore material act as insulator.
As the temperature increases,KE increases, which results in the motion of electrons.so conductivity increases.
If the temperature increases further more velocity of electrons become high,results in the collision of particles.thereby increase resistivity.so conductivity decreases.
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