For metals, when temperature increases → resistance increases → conductivity decreases. For semiconductors (like silicon or germanium), when temperature increases → more electrons get energy to jump to the conduction band → conductivity increases.
When a substance was heated, its conductivity was increased, what should it be out of the following?
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Question context
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.