Questions
Choose the false statement from the following:
detailed solution
Correct option is D
In insulators, energy gap is of the order of 5 to 10 eV and it is practically impossible to impart this much amount of energy to the electrons in valence band so as to jump to conduction band . So, choice (1) is correct.In semiconductors, with the rise in temperature more electrons from valence band jump to conduction band and this results in increase in conductivity.So, choice (2) is correct. In conductors, the conduction band is either partially filled or the conduction band overlaps on the valence band. So, choice (3) is correct. In semiconductor, resistivity decreases with increase in temperature. So, choice (4) is wrong.Talk to our academic expert!
Similar Questions
An n-type semiconductor has impurity level 20meV below the conduction band. In a thermal collision, transferable energy is KT. The value of T for which electrons start to jump in conduction band is :
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