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Questions  

Which of the following statements are true about semi conductors?

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

detailed solution

Correct option is B

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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Similar Questions

Match the items given in Column I with the items given in Column II.
 

 Column I Column II
A.Mg in solid state1.p -type semiconductor
B.MgCl2 in molten state2.n-type semiconductor
C.Silicon with phosphorus3.Electrolytic conductor
D.Germanium with boron4.Electronic conductor


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