Semiconducting Devices Question 155
Question: The impurity atom added to germanium to make it N-type semiconductor is
[KCET 1993; KCET (Engg./Med.) 2000]
Options:
A) Arsenic
B) Iridium
C) Aluminium
D) Iodine
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Answer:
Correct Answer: A
Solution:
For N-type semiconductor, the impurity should be pentavalent.