Question

The temperature $(T )$ dependence of resistivity $(r)$ of a semiconductor is represented by

• A.
• B.
• C.
• D.

Answer 1

Answer: (B)

Answer 2

The variation of specific resistance with temperature is given by $\rho=\rho_{0}\left[1+\alpha\left(T-T_{0}\right)\right]$ where $\rho =$ specific resistance at temperature $T$ $\rho_{ref} =$ specific resistance of reference temperature $\alpha=$ temperature coefficient of resistance which is negative for semiconductor. $\rho=\rho_{0}-\rho_{0} \alpha\left(T-T_{0}\right)$ Comaring with straight line equation, $y=m x+c$ $\Rightarrow m$, slope is negative.