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E6A03

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

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