Question 199: Semiconductors and Logic Gates

Question

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

Accepted Answer

Specific resistance is resistivity which is given by
$$ho  = {m \over {m{e^2}\,	au }}$$
where $$n=no.$$ of free electrons per unit volume and $$	au $$ $$=$$ average relaxation time
For a conductor
with rise in temperature $$n$$ increases and $$	au $$ decreases. But decrease in $$	au $$ is more dominant than increase in $$n$$ resulting an increase in the value of $$ho $$
For a semiconductor
with rise in temperature, $$n$$ increases and $$	au $$ decreases.  But the increase in  $$n$$ is more dominant than decrease in $$	au $$ resulting in decrease in the value of $$ho .$$

Answer

increases for both

Answer

decreases for both

Answer

increases, decreases

Answer

decreases, increases

Semiconductors and Logic Gates

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

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