Question

With rise in temperature the electrical conductivity of intrinsic semiconductor:

• A. increases
• B. decreases
• C. first increases and then decreases
• D. first decreases and then increases

Answer 1

Answer: (A)

In an intrinsic semiconductor, the gap between the valence band and the conduction band is minimal. The electrons residing in the valence band can acquire energy and jump to the conduction band. When a semiconductor’s temperature increases, it increases the electrons’ energy, resulting in increased conductivity of the intrinsic semiconductor.