When N-type of semiconductor is heated :
Correct answer: D. Number of electrons and holes increases equally
- A. Number of electrons increases while that of holes decreases.
- B. Number of holes increases while that of electrons decreases
- C. Number of electrons and holes remains the same.
- D. Number of electrons and holes increases equally
Explanation
When an N-type semiconductor is heated, electrons gain energy and can move more freely, resulting in increased electrical conductivity. Additionally, heating causes the generation of electron-hole pairs, leading to an increase in both electrons and holes equally. Therefore, the correct option is that the number of electrons and holes increases equally. Other options are incorrect because they either ignore the creation of electron-hole pairs or incorrectly state the changes in charge carrier numbers.
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About Electrical Properties of Solids
Electrical properties of solids depend on their band structure, charge carriers and conductivity. The topic compares conductors, insulators and semiconductors, relates resistivity to temperature, and covers intrinsic and extrinsic semiconductors, donor and acceptor impurities, electron and hole conduction, and the formation of p-type and n-type materials.
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