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In a p-n junction diode, the depletion region forms due to:
- Diffusion of majority carriers
- Drift of minority carriers
- Recombination of electrons and holes
- All of these
Answer: All of these
Depletion region: majority carriers diffuse across junction, recombine, leaving immobile ions. Creates built-in potential barrier. Fundamental to diode rectification, transistor operation. [[NCERT Physics Class 12]]