The depletion region is formed when a P-type and N-type semiconductor are joined to create a PN junction. Electrons from the N-side diffuse toward the P-side and recombine with holes, leaving behind immobile charged ions near the junction. This creates a region depleted of mobile charge carriers and establishes the built-in electric field and potential barrier. The depletion region exists under equilibrium even without an externally applied voltage.
The depletion region of a junction is formed ______.
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This question is part of 📡 Electronics and Communication Engineering (ECE) within the broader 🛠️ Engineering Essentials subject and appears in the PTS Pakistan Testing Service preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.