1.

To get n-type doped semiconductor, the impurity to be added to silicon should have the following number of valence electrons ?

Answer»

5
2
1
3

Solution :When a pure semiconductor of Ge or SI is doped with a controlled amount of pentavalent atoms, say arsenic or phosphorus or ANTIMONY or BISMUTH, it is called N-type semiconductor because the conduction of electricity in such semiconductor is due to MOTION of ELECTRONS i.e., negative charges.


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