alleryStart learning →In a p-n junction at equilibrium (no applied bias), the net current across the junction is which?
AZero (drift exactly balances diffusion)
BEqual to the saturation current Is
CEqual to V_T / r_s
DInfinite due to depletion field
Answer & Solution
Correct answer: A. Zero (drift exactly balances diffusion)
At equilibrium: diffusion current (driven by gradient) exactly cancels drift current (driven by built-in field) for both electrons and holes. Net = 0.
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