Question

In a semiconducting material the mobilities of electrons and holes are $\mu_{e}$ and $\mu_{h}$ respectively. Which of the following its true?

• A. $\mu_{e} > \mu_{h}$
• B. $\mu_{e} < \mu_{h}$
• C. $\mu_{e} = \mu_{h}$
• D. $\mu_{e} < 0; \mu_{h} > 0$

Answer 1

Answer: (A)

$\mu_{e} > \mu_{h}$

Answer 2

Hole is massive than electron, thus, mobility of holes is less than that of electrons, that is $\mu_{h} < \mu_{e}$ or $\mu_{e} > \mu_{h}$