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When n-type semiconductor is heated

1. number of electrons increases while that of holes decreases
2. number of holes increases while that of electrons decreases
3. number of electrons and holes remain same
4. number of electrons and holes increases equally

Correct answer: number of electrons and holes increases equally

Solution

When an n-type semiconductor is heated, thermal excitation generates electron-hole pairs, increasing both electrons and holes. However, the increase in holes is negligible compared to the already high electron concentration.

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