Question

When a pure semiconductor is heated, its resistance_________

Answer 1

Pure Semiconductor:

1. A semiconductor is a material that has an electrical conductivity that is halfway between that of a conductor and that of an insulator.
2. Pure semiconductors are semiconductors that are chemically pure, that is, free of impurities.
3. Because of the thermal energy supplied, some covalent bonds in the semiconductor break as the temperature is elevated.
4. The bond was broken, releasing the electrons that were involved in the creation of the bonds.
5. If the potential difference is put across the semiconductor, these liberated electrons can generate a small electric current.
6. As a result, as the temperature rises, the resistance reduces.

Therefore, when a pure semiconductor is heated, its resistance decreases.