An intrinsic semiconductor is a pure semiconductor without any significant impurity. At thermal equilibrium, every electron excited to the conduction band leaves behind a hole in the valence band, so the number of free electrons equals the number of holes.
In an intrinsic semiconductor, the number of free electrons?
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This question is part of ⚡ Electrical Engineering within the broader 🛠️ Engineering Essentials subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.