Q. Choose the correct statement
A) When we heat a semiconductor its resistance increases
B) When we heat a semiconductor its resistance decreases
C) When we cool a semiconductor to 0 K then it becomes super conductor
D) Resistance of a semiconductor is independent of temperature
Explanation
(b) The temperature coefficient of resistivity is negative for semiconductors. This means that the resistivity decreases as we raise the temperature of such a material. The magnitude of the temperature coefficient of resistivity is often quite large for a semiconducting material. The electrical resistance of semiconductor decreases (or conductivity increases) with rise in temperature.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.