on the basis of band theory differentiate between conductor and semi conductor
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according to band theory...the conductance band ( where electrons freely move or found) and the Valence band ( where electrons do the job of valency) are overlapped with each other becuase of which electrons in either of the band ( Conductance or Valence ) can easily conduct electricity...
But in semiconductor , There is a gap between these two bands...this gap is nothing just an energy gap....If electron get energy equal to that gap may be equal to 3eV ( eV = electron volt a unit of energy) then electron easily jump to conductance band...This gap is small in semiconductor as compared to an Insulator...
At 0 kelvin , Conductance band is empty and valence band is full..and semiconductor behave like an insulator as there is no electron for the conducticity in the Conductance band...
...at Room temperature i.e 300k Some of the electron in valence band energized or get energy due to which they jump to conductance band as a result Semiconductor behave like a conductor...
But in semiconductor , There is a gap between these two bands...this gap is nothing just an energy gap....If electron get energy equal to that gap may be equal to 3eV ( eV = electron volt a unit of energy) then electron easily jump to conductance band...This gap is small in semiconductor as compared to an Insulator...
At 0 kelvin , Conductance band is empty and valence band is full..and semiconductor behave like an insulator as there is no electron for the conducticity in the Conductance band...
...at Room temperature i.e 300k Some of the electron in valence band energized or get energy due to which they jump to conductance band as a result Semiconductor behave like a conductor...
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