Q.
Which of the following statements are true about semi conductors?
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a
Silicon doped with electron rich impurity is a p-type semiconductor.
b
Silicon doped with an electron rich impurity is an n-type semiconductor
c
Delocalized electrons increase the conductivity of doped silicon
d
An electron vacancy increases the conductivity of n-type semiconductor
answer is B.
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Detailed Solution
Silicon doped with an electron rich impurity is a n type semiconductor. Conductivity of n-type semiconductor is due to the presence of free electron. Delocalization of electrons increases the conductivity of doped silicon due to increase in mobility of electron.
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