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Grade upto college level IIT JEE Entrance Exam

Which of the following, when added as an impurity, into the silicon, produces n-type semi conductor?

(a) Phosphorous

(b) Aluminium

(c) Magnesium

(d) Both b and c

Profile image of Amit Saxena
12 Years agoGrade upto college level
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1 Answer

Profile image of Aditi Chauhan
12 Years ago

(a)

Phosphorous (P) is pentavalent and silicon is tetravalent. Therefore, when silicon is doped with pentavalent impurity, it forms a n-type semiconductor.

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