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← ScienceWhich mechanism restricts current under reverse bias in diodes specifically?
A)Minority carrier diffusion reduction✓
B)Impact ionization avalanche creation
C)Zener breakdown hole tunneling
D)Surface leakage channel formation
💡 Explanation
Reverse bias narrows the space charge width, increasing its resistance; therefore minority carrier diffusion reduction limits the reverse current, because the electric field sweeps carriers. This happens rather than avalanche or tunneling, requiring higher voltages influencing breakdown processes.
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