Physics Question on Semiconductor electronics: materials, devices and simple circuits

Question

Choose correct graph of resistivity and temperature for semi-conductor material.

Answer 1

Solution

$\rho =\frac{m}{ne^{2}\tau}$
As the T increases the $\tau$ decreases but n increases, but the n is dominant over $\tau$ . so the $\rho$ decreases as the temperature increases.

So, the correct graph is option (C)