FCC Question Pool Review

Amateur Extra Class (Element 4) • 2024-2028

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Question E6A03

From subelement E6 - E6A

E6A03
Answer: C

Why does a PN-junction diode not conduct current when reverse biased?

AOnly P-type semiconductor material can conduct current
BOnly N-type semiconductor material can conduct current
CHoles in P-type material and electrons in the N-type material are separated by the applied voltage, widening the depletion region
DExcess holes in P-type material combine with the electrons in N-type material, converting the entire diode into an insulator