Question

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

• A.

  

• B.

  

• C.

  

• D.

  

Answer 1

The Correct Option is B

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.