MP Board · Class 12 · Physics · Semiconductor ElectronicsThe electrical conductivity of a semiconductor increases with rise in temperature because:
Step-by-Step Solution
As temperature increases, thermal agitation breaks more covalent bonds, generating a larger number of electron-hole pairs. This increase in charge carrier concentration outweighs the decrease in mobility, leading to a net increase in conductivity.
Detailed Options Breakdown
Option : Band gap decreases
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Semiconductor Electronics.
Option 1: Number of free electrons and holes increases (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Atomic size increases
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Semiconductor Electronics.
Option 3: Resistance increases
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Semiconductor Electronics.
💡 Study Guide: This question tests core syllabus concepts from Semiconductor Electronics. For formulas, key summaries, and mock exam reference guides, read the full Semiconductor Electronics Revision Notes.