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← ScienceWhich mechanism causes decreased conductivity across a semiconductor p-n junction when reverse biased?
A)Increased depletion region width✓
B)Enhanced electron-hole recombination rates
C)Reduced minority carrier diffusion
D)Increased energy gap tunneling
💡 Explanation
Applying reverse bias increases the width of the depletion region via carrier depletion, with reverse saturation current decreasing conductivity; because fewer carriers are available, therefore a wider gap forms rather than allowing carrier flow.
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