Semiconductors: n-type Doping MCQ

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n-type DopingEasyQuestion 20202

Question

Adding pentavalent (Group-V) impurity like phosphorus or arsenic to silicon produces:

A
p-type semiconductor
B
n-type semiconductor
Correct
C
Insulator
D
Metal

Correct answer

n-type semiconductor

Explanation

Pentavalent atoms have 5 valence electrons — 4 form covalent bonds with Si, the 5th is a free electron. These extra electrons are majority carriers → n-type (negative carriers majority).

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