Semiconductor Electronics Materials Devices and Simple Circuits - Result Question 47

48. When arsenic is added as an impurity to silicon, the resulting material is

[1996]

(a) n-type semiconductor

(b) p-type semiconductor

(c) n-type conductor

(d) insulator

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Answer:

Correct Answer: 48. (a)

Solution:

  1. (a) Arsenic contains 5 electrons in its outermost shell. When Arsenic is mixed with silicon there is one electron extra in silicon crystal. Hence, such type of semi conductor is $n$-type semi conductor.