The temperature dependence of resistance of Cu and undoped Si in the temperature range `300 -400 K, ` is best described by :

Options

A. Linear increase for Cu, exponential increase for Si
B. Linear increase for Cu, exponential decrease for Si
C. Linear decrease for Cu, linear decrease for Si
D. Linear increase for Cu, linear increase for Si

Answer

B

Explanation

For semiconductor resistance decreases exponentially in this temperature range, while for Cu resistance linearly increases with temperature.