Question

By increasing the temperature, the specific resistance of a conductor and a semiconductor

• A. decreases for both
• B. increases for both
• C. increases, decreases
• D. decreases, increases

Answer 1

The correct option is C increases, decreases

With rise in temperature in conductors, the number of collision between free electrons increases due to increase in thermal energy and thus the free electrons find it difficult to drift in a particular direction, resulting in the increase in specific resistance of the conductor.

Whereas as in semiconductor, valance band electrons reach the conduction band as the temperature increases and become capable of conducting current and thus results in the increase of the conductivity or decrease in specific resistance.