Question

With rise in temperature, resistance of a semiconductor material (germanium or silicon)

• A. increases
• B. decreases
• C. remains the same
• D. first increases then decreases

Answer 1

The correct option is B decreases

With rise in temperature, the number of charge carriers (holes and electrons) increases in the case of a semiconductor dominating the effect of decreasing relaxation time, increasing collision frequency.
So, as a whole the resistance of the material decreases with rise in temperature.