EasyPhysicsdiode
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When a small amount of pentavalent impurity is added to a pure semiconductor, it becomes
A
An n-type semiconductor
B
A p-type semiconductor
C
An insulator
D
A superconductor
Explanation
Pentavalent impurities (like Phosphorus or Arsenic) have 5 valence electrons. Four form bonds with the semiconductor, leaving one extra electron as a majority charge carrier, creating an n-type (negative) semiconductor.
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